Someone me solve this i need to know how to do it

I'm gonna say that the answer if 12 (correct me if i'm wrong) so basically, following order of operations, you weed need to subtract something first, before that though, you need to find what number you can multiply 4 with to get 12, which the answer is 3. Knowing this, you need the subtraction problem to equal 3, so you add 3+2=5. x=5. so to put it in perspective, 5-2=3x4=12 hopefully i explained this well

the answer would be c ≈ 18.852*3.14= 6.286.28*3=18.85