This project uses variables in order to effectively calculate the determinant! It's guaranteed to work every time for any 2x2 or 3x3 matrix! The formatting I used is as follows: R (Row Number) C (Column Number) Rows go left and right, columns go up and down. For example, in a 3x3 matrix, the center is R2C2 because it's in the 2nd row and 2nd column. Make sure not to enter anything other than a numerical value. Using letters or other characters will prevent the project from calculating the determinant correctly. Hold your mouse (or finger, if you're on mobile) down to see the most recent determinants that have been calculated by Scratchers for both 2x2 and 3x3 matrices. To learn more about how to calculate the determinant of a matrix, go here: https://www.mathsisfun.com/algebra/matrix-determinant.html