Of course you can use Windows 7’s Calculator to do simple calculations such as addition, subtraction, multiplication, and division; but Calculator also offers the advanced capabilities of a programming, scientific, and statistical calculator too.
It has a unit of measure converter which includes angle, area, energy, length, power, pressure, temp, time, velocity, volume, weight and mass.
It even calculates fuel economy, lease or mortgage payments, and a lot more. If you’re a scientific mathematics type, you can even do whatever it is that advanced math types do. I think.