Alright, let's work through 64705197 times 72217819 step by step
64705197 × 72217819 = 72217819 × (64705197)
+ 72217819 × 7 that results in 505524733
+ 72217819 × 90 which equals 6499603710
+ 72217819 × 100 that equals 7221781900
+ 72217819 × 5000 which equals 361089095000
+ 72217819 × 00000 that equals 0
+ 72217819 × 700000 giving us 50552473300000
+ 72217819 × 4000000 resulting in 288871276000000
+ 72217819 × 60000000 yielding 4333069140000000

= 4672868205305343
