Alright, let's work through 89077942 times 64770364 step by step
89077942 × 64770364 = 64770364 × (89077942)
+ 64770364 × 2 which equals 129540728
+ 64770364 × 40 that is equal 2590814560
+ 64770364 × 900 resulting in 58293327600
+ 64770364 × 7000 yielding 453392548000
+ 64770364 × 70000 that equals 4533925480000
+ 64770364 × 000000 yielding 0
+ 64770364 × 9000000 that is equal 582933276000000
+ 64770364 × 80000000 that equals 5181629120000000

= 5769610727710888
