Alright, let's work through 77670424 times 67832399 step by step
77670424 × 67832399 = 67832399 × (77670424)
+ 67832399 × 4 which equals 271329596
+ 67832399 × 20 that results in 1356647980
+ 67832399 × 400 that equals 27132959600
+ 67832399 × 0000 that equals 0
+ 67832399 × 70000 giving us 4748267930000
+ 67832399 × 600000 that equals 40699439400000
+ 67832399 × 7000000 giving us 474826793000000
+ 67832399 × 70000000 which equals 4748267930000000

= 5268571191267176
