Your task is to implement class SmartCalculator. All methods in class should be chainable. The priority of different operations should be kept in mind. It means, that 2 + 2 * 2 is 6, not 8.
For example:
const calculator = new SmartCalculator(2);
const value = calculator
.add(2)
.multiply(2);
console.log(value); // 6Constructor should take initial value.
Be sure, that all tests work with integers.
Write your solution in src/index.js