Alright, let's work through 78216964 times 89245210 step by step
78216964 × 89245210 = 89245210 × (78216964)
+ 89245210 × 4 what gives us 356980840
+ 89245210 × 60 that is equal 5354712600
+ 89245210 × 900 which equals 80320689000
+ 89245210 × 6000 yielding 535471260000
+ 89245210 × 10000 which equals 892452100000
+ 89245210 × 200000 resulting in 17849042000000
+ 89245210 × 8000000 what gives us 713961680000000
+ 89245210 × 70000000 that results in 6247164700000000

= 6980489377742440
