baffled by this translation - use?

The translation offered is "We have to use the pot to cook." which sounds like the mandatory thing is using the pot. However, based on the sentence, the only mandatory thing is cooking, and "with the pot" is just a dependent clause that could be removed.

We have to cook with the pot.

A 420 cake

Mi pensas ke ĉi tiu estas korecte respondon, "Ni devas uzi poto per kuiri".

What is the original language of this strange sentence?