Easy JavaScript Solution ...
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n```\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){\n            throw new Error(\'Division by zero is not allowed\')\n        } \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']