Convert 45 yards into inches.

Step 1 ：Given that 1 yard is equal to 36 inches, we can set up the conversion as follows: \(45 \text{ yards} \times \frac{36 \text{ inches}}{1 \text{ yard}}\)

Step 2 ：Multiplying, we get \(45 \times 36 = 1620 \text{ inches}\)