`#3107.101107`
\(\text{345 x 17 + 554 x 625 + 155 x 17 - 54 x 625}\\ =17\times\left(345+155\right)+625\times\left(554-54\right)\\ =17\times500+625\times500\\ =8500+312500\\ =321000\)
345 . 17 + 554 . 625 + 155 . 17 - 54 . 625
= 17 ( 345 + 155 ) + 625 ( 554 - 54)
= 17 . 500 + 625 . 500
= 8500 + 312500
= 321000