Any clarification on how to do this would be great.

On a certain scale of intensity, each increment of 10 in magnitude represents a tenfold increase in intensity. On this scale, an intensity corresponding to a magnitude of 165 is how many times an intensity corresponding to a magnitude of 125?

(A) 40

(B) 100

(C) 400

(D) 1,000

(E) 10,000

Answer is e