AMC 8 1987 Problem 14

A computer can do $10,000$ additions per second. How many additions can it do in one hour? $\text{(A)}\ 6\text{ million} \text{(B)}\ 36\text{ million} \text{(C)}\ 60\text{ million} \text{(D)}\ 216\text{ million} \text{(E)}\ 360\text{ million}$