Alright, let's work through 79245420 times 67714657 step by step
79245420 × 67714657 = 67714657 × (79245420)
+ 67714657 × 0 producing 0
+ 67714657 × 20 what gives us 1354293140
+ 67714657 × 400 what gives us 27085862800
+ 67714657 × 5000 giving us 338573285000
+ 67714657 × 40000 producing 2708586280000
+ 67714657 × 200000 yielding 13542931400000
+ 67714657 × 9000000 resulting in 609431913000000
+ 67714657 × 70000000 giving us 4740025990000000

= 5366076434120940
