Alright, let's work through 64827801 times 72849783 step by step
64827801 × 72849783 = 72849783 × (64827801)
+ 72849783 × 1 that results in 72849783
+ 72849783 × 00 resulting in 0
+ 72849783 × 800 what gives us 58279826400
+ 72849783 × 7000 giving us 509948481000
+ 72849783 × 20000 giving us 1456995660000
+ 72849783 × 800000 yielding 58279826400000
+ 72849783 × 4000000 giving us 291399132000000
+ 72849783 × 60000000 producing 4370986980000000

= 4722691235217183
