Alright, let's work through 78502920 times 75899207 step by step
78502920 × 75899207 = 75899207 × (78502920)
+ 75899207 × 0 producing 0
+ 75899207 × 20 that equals 1517984140
+ 75899207 × 900 that equals 68309286300
+ 75899207 × 2000 what gives us 151798414000
+ 75899207 × 00000 that equals 0
+ 75899207 × 500000 resulting in 37949603500000
+ 75899207 × 8000000 giving us 607193656000000
+ 75899207 × 70000000 resulting in 5312944490000000

= 5958309375184440
