344*627:(9107-8978)=129

The expression (344*627) / (9107 - 8978) equals 1672, not 129.

Here's a quick simplification:

• 9107 - 8978 = 129
• 344 = 843 and 129 = 343, so cancel 43: (344627)/129 = (8627)/3
• 8*627 = 5016, and 5016/3 = 1672

So the left side is 1672. The given "=129" is incorrect.