When I pull the values I want to multiply, they\'re strings. So I pull them, parse them as floats (to preserve the decimal places), and multiply them together.
JavaScript/TypeScript have only one Number class which is not that good. I have the same problem as I am using TypeScript. I solved my problem by using decimal.js-light library.
new Decimal(78).mul(7).mul(0.0725) returns as expected 39.585