Click the math operations buttons to make the Build Number equal the Target number. You can play for speed or elegance (keeping your number of clicks to a minimum). Type R to clear the Scores list. (Reset Scores) Type I to change the Time you get for one game (Initialize).
Developed to practice math skills and allow people to experiment with which buttons would make for effective "Build a Number" toolsets. See "Build a Number Multiply Big" and "Build a Number Multiply Drill" for variations on this theme.