Alright, let's work through 84790169 times 78737731 step by step
84790169 × 78737731 = 78737731 × (84790169)
+ 78737731 × 9 giving us 708639579
+ 78737731 × 60 that results in 4724263860
+ 78737731 × 100 yielding 7873773100
+ 78737731 × 0000 that results in 0
+ 78737731 × 90000 that is equal 7086395790000
+ 78737731 × 700000 what gives us 55116411700000
+ 78737731 × 4000000 yielding 314950924000000
+ 78737731 × 80000000 which equals 6299018480000000

= 6676185518166539
