Just to make sure

I do this sometimes because once I mistook 5 x 5 for 10 instead of 25 in a math test. I noticed it when I had already solved a lot and had to cancel everything

Just gotta be sure

measure twice, cut once.

My university UNIVERSITY classmate once did a 1÷2 in the calculator.
I just looked her in the eyes
Did you really just do that?
Her: ...
Let pretend this never happens.
Her: ... thanks.
I'm in the same group with her this semester too (huh lucky) I don't think I'll survive.