How many unique ways are there to arrange the letters in the word ape

We are asked to determine the possible arrangement of the given word which is APE. As observed, in the given word APE, we only have three unique letters such as letter A, letter P and letter E. Since we have a three unique letter word, we can use 3! to solve the possible arrangement and the solution is shown below:
We are using the sign ! which means we need to perform factorial to solve the possible arrangement or letter A, P and E
3! = 3*2*1 = 6

Therefore, we 6 possible arrangement of the word APE.