One possible answer is rather simple: 24.

Since the OP wants to do a calculation, we need to extract the numbers. For each question we have 4 times the number one and the questions are numbered 1, 2, and 3.

Therefore we get 1*(1+1+1+1) + 2*(1+1+1+1) + 3*(1+1+1+1) = 4 + 8 + 12 = 24.