### Home > CC1 > Chapter 7 > Lesson 7.2.2 > Problem7-56

7-56.
1. Calculate each of the following products without using a calculator. Homework Help ✎

1. (3.1)(0.02)

$\frac{a}{b}\cdot\frac{c}{d}=\frac{a \cdot\ c}{b \cdot\ d}$

Use a generic rectangle, as shown below.

Change the mixed numbers into fractions and then refer to part (a) for help.

$\frac{40}{21}=1\frac{19}{21}$