Alright, let's work through 64389797 times 48379464 step by step
64389797 × 48379464 = 48379464 × (64389797)
+ 48379464 × 7 resulting in 338656248
+ 48379464 × 90 what gives us 4354151760
+ 48379464 × 700 which equals 33865624800
+ 48379464 × 9000 what gives us 435415176000
+ 48379464 × 80000 which equals 3870357120000
+ 48379464 × 300000 which equals 14513839200000
+ 48379464 × 4000000 giving us 193517856000000
+ 48379464 × 60000000 resulting in 2902767840000000

= 3115143865928808
