I NEED HELP ASAP!!!!!!

Answer:
I say the answer is c or a. 1,186.92 or 439.6. I don't know how my calculator got 1,186.92 but it is a special one just for this type of problem. I multiplied 20 x 7 x 3.14 and it = 439.6.
Step-by-step explanation:
HOPE THIS HELPS YOU!!!!! :) :) :) :) :)
Sorry if both are wrong. :) :) :) :) :)