Alright, let's work through 67080276 times 78628554 step by step
67080276 × 78628554 = 78628554 × (67080276)
+ 78628554 × 6 giving us 471771324
+ 78628554 × 70 producing 5503998780
+ 78628554 × 200 that is equal 15725710800
+ 78628554 × 0000 that is equal 0
+ 78628554 × 80000 which equals 6290284320000
+ 78628554 × 000000 giving us 0
+ 78628554 × 7000000 that results in 550399878000000
+ 78628554 × 60000000 which equals 4717713240000000

= 5274425103800904
