Apply factor column values to new columns in R

Question

Did some extensive searching but couldn't find a solution. I have a dataframe that looks like this:

FAC | NUM | VAL
A   | 1   | 100
A   | 2   | 200
B   | 1   | 300
B   | 2   | 200

And I want it to look like this:

NUM | A   | B  
1   | 100 | 300
2   | 200 | 200

Is there any simple way to use mutate() in dplyr (potentially in combination with base R) to achieve this goal?

Any support would be appreciated.