Convert 15 miles into yards.

Step 1 ：Step 1: We know that 1 mile is equal to 1760 yards. So, to convert miles to yards, we multiply the number of miles by 1760.

Step 2 ：\[ 15 \text{ miles} \times 1760 \text{ yards/mile} \]

Step 3 ：Step 2: Multiply 15 by 1760.

Step 4 ：\[ 15 \times 1760 = 26400 \]