Alright, let's work through 78264689 times 20735061 step by step
78264689 × 20735061 = 20735061 × (78264689)
+ 20735061 × 9 yielding 186615549
+ 20735061 × 80 yielding 1658804880
+ 20735061 × 600 what gives us 12441036600
+ 20735061 × 4000 what gives us 82940244000
+ 20735061 × 60000 what gives us 1244103660000
+ 20735061 × 200000 that equals 4147012200000
+ 20735061 × 8000000 yielding 165880488000000
+ 20735061 × 70000000 giving us 1451454270000000

= 1622823100561029
