the goal is to get the number on the screen by picking numbers that you will elevate to the power of 2. the number is truncated to 8 numbers after the dot so u don't lose your sanity. for example, to get 81 you will need to type 9. but you won't always get so lucky, so for the numbers like 87 you'll have to guess 9.327379053 there are more complex strategies, but i'll let you discover them for urself :)