How many moles of UF6 would have to be decomposed to provide enough fluorine to prepare 2.14 mol of CF4?

Question

I'm not sure how to solve this problem?
So far all I did is calculate the moles of F in CF4, which is 8.56 moles

Answer 1

2.14 mol CF4 x (4 mol F/1 mol CF4) x (1 mol UF6/6 mol F) = ? mol UF6.