Finding Length of Side in Triangle using Law of Sines

In triangle ABC, angle A measures 40 degrees, and angle B measures 70 degrees. The length of side a, opposite angle A, is 8 cm. Using the Law of Sines, what is the length of side b, opposite angle B?

Recall that the Law of Sines states: $$ \f\frac{a}{\sin(A)} = \f\frac{b}{\sin(B)} $$