The example for Grains needs to be updated so the Square and Total functions return a string.
The exercise difficulty needs to be updated to medium.
The "grains on square 64" and "returns the total number of grains on the board" tests need to be updated to use the correct expected values as strings.
https://forum.exercism.org/t/odd-arithmetic-in-grains/8662/23
The example for Grains needs to be updated so the Square and Total functions return a string.
The exercise difficulty needs to be updated to medium.
The "grains on square 64" and "returns the total number of grains on the board" tests need to be updated to use the correct expected values as strings.