# Pre-Algebra Examples

Step 1

The surface area of a box is equal to the sum of the areas of each side of the box.

Step 2

Substitute the values of the length , the width , and the height into the formula.

Step 3

Step 3.1

Multiply .

Step 3.1.1

Multiply by .

Step 3.1.2

Multiply by .

Step 3.2

Multiply .

Step 3.2.1

Multiply by .

Step 3.2.2

Multiply by .

Step 3.3

Multiply .

Step 3.3.1

Multiply by .

Step 3.3.2

Multiply by .

Step 4

Step 4.1

Add and .

Step 4.2

Add and .