Alright, let's work through 64987589 times 73727995 step by step
64987589 × 73727995 = 73727995 × (64987589)
+ 73727995 × 9 resulting in 663551955
+ 73727995 × 80 that results in 5898239600
+ 73727995 × 500 yielding 36863997500
+ 73727995 × 7000 that equals 516095965000
+ 73727995 × 80000 yielding 5898239600000
+ 73727995 × 900000 giving us 66355195500000
+ 73727995 × 4000000 resulting in 294911980000000
+ 73727995 × 60000000 giving us 4423679700000000

= 4791404636854055
