$18 \mathrm{yd}$ to feet \[ 18 \mathrm{yd}=\square \mathrm{ft} \]

Step 1 ：Given that there are 3 feet in a yard, we can convert 18 yards to feet by multiplying 18 by 3.

Step 2 ：Using Python, we can write this as 'yards = 18', 'feet_per_yard = 3', and 'feet = yards * feet_per_yard'.

Step 3 ：Running this code gives us 'feet = 54'.

Step 4 ：So, 18 yards is equal to 54 feet.

Step 5 ：Final Answer: \(\boxed{54}\) feet.