If a football field is 120 yards long, how many feet is it?

Step 1 ：We know that 1 yard equals 3 feet. So, we can use this conversion factor to convert yards into feet.

Step 2 ：Multiply the length of the football field in yards (120) by the conversion factor (3).

Step 3 ：Doing this gives us \(120 \times 3\) feet.