Step-by-step explanation:
Let's break it down step by step following the order of operations (PEMDAS/BODMAS):
\[ 13 \times \left[18 \div (15 - 9)\right] \]
First, solve the expression inside the brackets:
\[ 15 - 9 = 6 \]
Now, replace that within the brackets:
\[ 18 \div 6 = 3 \]
Finally, multiply by 13:
\[ 13 \times 3 = 39 \]
Therefore, the simplified expression is \( 39 \).
