Alright, let's work through 77373720 times 79578217 step by step
77373720 × 79578217 = 79578217 × (77373720)
+ 79578217 × 0 what gives us 0
+ 79578217 × 20 yielding 1591564340
+ 79578217 × 700 that results in 55704751900
+ 79578217 × 3000 that equals 238734651000
+ 79578217 × 70000 giving us 5570475190000
+ 79578217 × 300000 that equals 23873465100000
+ 79578217 × 7000000 resulting in 557047519000000
+ 79578217 × 70000000 that results in 5570475190000000

= 6157262680257240
