|18| • |-3|

To solve the expression \( |18| \cdot |-3| \), you need to calculate the absolute values first:

1. The absolute value of \( 18 \) is \( 18 \).
2. The absolute value of \( -3 \) is \( 3 \).

Now, multiply these two absolute values together:

\[ 18 \cdot 3 = 54 \]

Therefore, the result of the expression \( |18| \cdot |-3| \) is \( 54 \).