Solution
\n\n# Code\njavascript []\nclass Calculator {\n    \n    /** \n     * @param {number} value\n     */\n    constructor(value) {\n        this.value = value;\n   
\n\n# Code\n```javascript []\nclass Calculator {\n    \n    /** \n     * @param {number} value\n     */\n    constructor(value) {\n        this.value = value;\n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */\n    add(value){\n        this.value += value;\n        return this;\n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */\n    subtract(value){\n        this.value -= value;\n        return this;\n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */  \n    multiply(value) {\n        this.value *= value;\n        return this;\n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */\n    divide(value) {\n        if(value == 0) throw new Error(\'Division by zero is not allowed\');\n        this.value /= value;\n        return this;\n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */\n    power(value) {\n        this.value = Math.pow(this.value, value);\n        return this;\n    }\n    \n    /** \n     * @return {number}\n     */\n    getResult() {\n        return this.value;\n    }\n}\n```
['JavaScript']