Simple JS 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```javascript []\nclass Calculator {\n    constructor(value) {\n        this.result = value;\n    }\n    \n    add(value){\n        this.result += value;\n        return this;\n    }\n\n    subtract(value){\n        this.result -= value;\n        return this;\n    }\n    \n    multiply(value) {\n        this.result *= value;\n        return this;\n    }\n    \n    divide(value) {\n        if (value === 0) {\n            throw new Error("Division by zero is not allowed");\n        } else {\n            this.result /= value;\n            return this;\n        }\n    }\n    \n    power(value) {\n        this.result = Math.pow(this.result, value);\n        return this;\n    }\n\n    getResult() {\n        return this.result;\n    }\n}\n```
['JavaScript']