Lena starts to use the standard algorithm to solve 39 x 4. Her work is shown below. х
39
4.
6
What number should Lena replace m with?

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.

Abc4n: 2mm: n2: 41: 2m: n=1: 2