A piece of cardboard is 12.0 cm long and 6.3 cm wide. What is the area of this piece of cardboard in square millimeters? Enter your answer to the correct number of significant figures.

Step-by-step explanation:

The piece of cardboard is 12.0 cm long and 6.3 cm wide.

1 centimeter = 10 millimeters

Therefore,

12 centimeters = 12 * 10 = 120 millimeters

6.3 centimeters = 6.3 * 10 = 63 millimeters

The cardboard is rectangular and the formula for determining the area of a rectangle is expressed as

Area = length * width

Therefore, the area of the cardboard is

120 * 63 = 7560 millimeters²