25% of 30% of 45% is equal to__________?

– by
25% of 30% of 45% is equal to__________?

A. 0.03375
B. 0.3375
C. 3.375
D. 33.75
Explanation:
(25/100) * (30/100) * (45/100)
1/4 * 3/10 * 9/20
27/800 = 0.03375