simple solution easy to understand
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```javascript []\nclass Calculator {\n    \n    /** \n     * @param {number} value\n     */\n    constructor(value) {\n        this.value=value;\n        \n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */\n    add(value){\n     this.value+=value\n   \n \n        return this\n\n        \n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */\n    subtract(value){\n            this.value-=value\n    \n        return this\n        \n    }\n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */  \n    multiply(value) {\n             this.value*=value\n        \n        return this\n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */\n    divide(value) {\n    \n        if(value==0){\n                this.value= "Division by zero is not allowed"\n            return this\n        }else{\n          this.value=  this.value /value\n   \n        return this}\n    }\n    \n    /** \n     * @param {number} value\n     * @return {Calculator}\n     */\n    power(value) {\n    \n this.value= Math.pow(this.value,value)\n     \n        return this\n    }\n    \n    /** \n     * @return {number}\n     */\n    getResult() {\n      return this.value\n    }\n}\n```
['JavaScript']