780-345-284

The result of the subtraction \( 780 - 345 - 284 \) is:

1. First, subtract 345 from 780: \[ 780 - 345 = 435 \]

2. Then, subtract 284 from 435: \[ 435 - 284 = 151 \]

So, the final result is \( 151 \).