Поделюсь результатом за 1500 рублей на карту Сбера или эквивалентную сумму в USD на кошелек WebMoney.
За реквизитами в ЛС.
<form id="form">
<input type="string" id="input" value="V * IV"/>
<input type="submit" value="Calculate"/>
<div id="result"></div>
</form>
<script>
function _instanceof(e,r){return null!=r&&"undefined"!=typeof Symbol&&r[Symbol.hasInstance]?!!r[Symbol.hasInstance](e):e instanceof r}function _classCallCheck(e,r){if(!_instanceof(e,r))throw new TypeError("Cannot call a class as a function")}function _defineProperties(e,r){for(var t=0;t<r.length;t++){var n=r[t];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(e,n.key,n)}}function _createClass(e,r,t){return r&&_defineProperties(e.prototype,r),t&&_defineProperties(e,t),e}function _escapeRegExp(e){return e.replace(/[.*+?^${}()|[\]\\\/]/g,"\\$&")}var NumbersConverter=function(){"use strict";function e(){_classCallCheck(this,e)}return _createClass(e,null,[{key:"getRomanToArabicNumbersMap",value:function(){return{M:1e3,CM:900,D:500,CD:400,C:100,XC:90,L:50,XL:40,X:10,IX:9,V:5,IV:4,I:1}}},{key:"romanToArabic",value:function(r){r=r.toUpperCase();var t=e.getRomanToArabicNumbersMap(),n=Object.keys(t).reduce(function(e,r){return e.push({r:r,a:t[r]}),e},[]).sort(function(e,r){return r.r.length-e.r.length}).reduce(function(e,r){return e[r.r]=r.a,e},{}),i=Object.keys(n),a=Object.values(n),s=0,o=0;for(var u in i)for(s=r.indexOf(i[u]);-1!=s;)o+=parseInt(a[u]),s=(r=r.replace(i[u],"-")).indexOf(i[u]);return o}},{key:"arabicToRoman",value:function(r){var t=e.getRomanToArabicNumbersMap(),n="";for(var i in t)for(;r>=t[i];)n+=i,r-=t[i];return n}}]),e}(),CalculatorExpression=function(){"use strict";function e(r,t){_classCallCheck(this,e),this.rawExpression=r,this.allowedOperations=t||[],this.attributes={isInvalid:!1,containsRomanNumbers:!1,containsArabicNumbers:!1,romanExpression:{firstNumber:void 0,operation:void 0,secondNumber:void 0},arabicExpression:{firstNumber:void 0,operation:void 0,secondNumber:void 0}},this.parse()}return _createClass(e,[{key:"escapeRegExp",value:function(e){return _escapeRegExp(e)}},{key:"parse",value:function(){var e=this.rawExpression,r=Object.keys(this.converter.getRomanToArabicNumbersMap()),t=this.allowedOperations,n=r.map(this.escapeRegExp.bind(this)).join(""),i=t.map(this.escapeRegExp.bind(this)).join("|"),a="([\\-\\d]+|[\\-".concat(n,"]+)"),s=new RegExp("".concat(a,"\\s?(").concat(i,")\\s?").concat(a),"ium");if("string"==typeof e&&e.length&&s.test(e)){var o=t.reduce(function(e,r){return e.replace(new RegExp(_escapeRegExp(r),"gum"),"")},e).replace(/[\t-\r \xA0\u1680\u2000-\u200A\u2028\u2029\u202F\u205F\u3000\uFEFF]+?/gm,""),u=o.replace(new RegExp("[^".concat(r.join(","),"]+?"),"gium"),"");if(!o.replace(/(?:[\0-\/:-\uD7FF\uE000-\uFFFF]|[\uD800-\uDBFF][\uDC00-\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF])+?/gm,"").replace(/[\t-\r \xA0\u1680\u2000-\u200A\u2028\u2029\u202F\u205F\u3000\uFEFF]+?/gm,"").length!=!u.length){var c=0<u.length;this.attributes.containsRomanNumbers=c,this.attributes.containsArabicNumbers=!c;var l=e.match(s)[2],p=e.split(l).reduce(function(e,r){return(r=r.trim()).length&&e.push(r),e},[]),b=function(e){e=e||function(e){return e};var r=function(r){var t=e(r)+"";return"-"===r.charAt(0)&&"-"!==t.charAt(0)?"-"+t:t};return{firstNumber:r(p[0]),operation:l,secondNumber:r(p[1])}};this.attributes.romanExpression=b(c?void 0:this.converter.arabicToRoman),this.attributes.arabicExpression=b(c?this.converter.romanToArabic:void 0)}else this.attributes.isInvalid=!0}else this.attributes.isInvalid=!0}},{key:"converter",get:function(){return NumbersConverter}},{key:"isInvalid",get:function(){return this.attributes.isInvalid}},{key:"containsRomanNumbers",get:function(){return this.attributes.containsRomanNumbers}},{key:"containsArabicNumbers",get:function(){return this.attributes.containsArabicNumbers}},{key:"romanExpression",get:function(){return this.attributes.romanExpression}},{key:"arabicExpression",get:function(){return this.attributes.arabicExpression}},{key:"expression",get:function(){return this.containsRomanNumbers?this.romanExpression:this.arabicExpression}}]),e}(),Calculator=function(){"use strict";function e(){_classCallCheck(this,e)}return _createClass(e,[{key:"calculate",value:function(e){var r=this.allowedOperations,t=new CalculatorExpression(e,r);if(t.isInvalid)throw new Error("Invalid expression");var n=t.arabicExpression,i=n.firstNumber,a=n.operation,s=n.secondNumber;if(i=parseInt(i),s=parseInt(s),1>i||10<i||1>s||10<s)throw new Error("All numbers must be greater than 0 and less than 11");var o=Math.floor(this.operations[a](i,s));return t.containsArabicNumbers?o:1>o?"":this.converter.arabicToRoman(o)}},{key:"operations",get:function(){return{"+":function(e,r){return e+r},"-":function(e,r){return e-r},"*":function(e,r){return e*r},"/":function(e,r){return e/r}}}},{key:"converter",get:function(){return NumbersConverter}},{key:"allowedOperations",get:function(){return Object.keys(this.operations)}}]),e}();
var input = document.querySelector('#input'),
form = document.querySelector('#form'),
resultBlock = document.querySelector('#result'),
calculator = new Calculator();
form.addEventListener('submit', function (e) {
e.preventDefault();
try {
resultBlock.textContent = calculator.calculate(input.value);
resultBlock.style.color = 'black';
} catch (e) {
resultBlock.textContent = e.message;
resultBlock.style.color = 'red';
}
});
</script>
