Alright, let's work through 78339351 times 67811478 step by step
78339351 × 67811478 = 67811478 × (78339351)
+ 67811478 × 1 yielding 67811478
+ 67811478 × 50 giving us 3390573900
+ 67811478 × 300 that equals 20343443400
+ 67811478 × 9000 what gives us 610303302000
+ 67811478 × 30000 that equals 2034344340000
+ 67811478 × 300000 which equals 20343443400000
+ 67811478 × 8000000 what gives us 542491824000000
+ 67811478 × 70000000 producing 4746803460000000

= 5312307176870778
