Hello all, nice to see you again

I have a calculating sheet with some variables data, where D1 is a drop down list, what I need to do is as follows:

If D1 = A, then F1=E1*1.0
and If D1 = B, then F1=E1*1.2
and If D1 = B, then F1=E1*1.3
and If D1 = B, then F1=E1*1.4

how can I do that?

Thanks in advance.