Two boys earn money mowing lawns. Jacob mowed 12 lawns this week. He mowed
3 times as many lawns as Kevin mowed.
In which equation does the box represent the number of lawns Kevin mowed?
A. 3 + □ = 12
B. 3 × □ = 12
C. 12 + 3 = □
D. 12 × 3 = □