I will create a simple computer program

I will create a Windows executable that takes whatever inputs you specify and gives you an output. For example, you might want to calculate how long it will take to pay off your debt given the minimum monthly payments at X% interest, and how much you'll end up paying overall. You may need to sort a list alphabetically, or draw names at random. So long as it's fairly simple like these examples, I can get it to you quickly, usually within the same day.