(1845 * 6 - 240: 3) - 345

Let's solve the expression step by step:

1. First, calculate \( 1845 \times 6 \): \[ 1845 \times 6 = 11070 \]

2. Next, calculate \( 240 \div 3 \): \[ 240 \div 3 = 80 \]

3. Now, substitute these values into the expression: \[ (11070 - 80) - 345 \]

4. Now, calculate \( 11070 - 80 \): \[ 11070 - 80 = 11090 \]

5. Finally, calculate \( 11090 - 345 \): \[ 11090 - 345 = 10745 \]

Therefore, the final result is: \[ \boxed{10745} \]