Which calculation is necessary to determine how many strips of wallpaper are required to cover a wall that is 10 feet long?

To determine how many strips of wallpaper are needed to cover a wall that is 10 feet long, it is essential to first convert the measurement of the wall length from feet to inches. This is crucial because wallpaper is typically measured in inches, which aligns with the width of each strip. By converting feet to inches and then dividing by the width of the wallpaper strip, you can calculate the exact number of strips required to cover that length of the wall.

For example, if the wallpaper strips are 20 inches wide, the calculation would involve converting the 10 feet into inches (which would be 120 inches) and then dividing that by the width (20 inches) to find out how many strips can fit in that measurement. This method provides a clear, quantifiable result, ensuring that the entire length of the wall can be adequately covered.