Alright, let's work through 78292979 times 81385034 step by step
78292979 × 81385034 = 81385034 × (78292979)
+ 81385034 × 9 which equals 732465306
+ 81385034 × 70 what gives us 5696952380
+ 81385034 × 900 that is equal 73246530600
+ 81385034 × 2000 which equals 162770068000
+ 81385034 × 90000 that results in 7324653060000
+ 81385034 × 200000 that equals 16277006800000
+ 81385034 × 8000000 giving us 651080272000000
+ 81385034 × 70000000 that results in 5696952380000000

= 6371876757876286
