Alright, let's work through 64522642 times 87931466 step by step
64522642 × 87931466 = 87931466 × (64522642)
+ 87931466 × 2 that is equal 175862932
+ 87931466 × 40 which equals 3517258640
+ 87931466 × 600 giving us 52758879600
+ 87931466 × 2000 that results in 175862932000
+ 87931466 × 20000 which equals 1758629320000
+ 87931466 × 500000 what gives us 43965733000000
+ 87931466 × 4000000 that results in 351725864000000
+ 87931466 × 60000000 that is equal 5275887960000000

= 5673570501253172
