345+[65*5]

To calculate the expression \( 345 + [65 \times 5] \):

1. First, calculate \( 65 \times 5 \): \[ 65 \times 5 = 325 \]

2. Now, add this result to 345: \[ 345 + 325 = 670 \]

Therefore, \( 345 + [65 \times 5] = 670 \).