Alright, let's work through 64252469 times 71360487 step by step
64252469 × 71360487 = 71360487 × (64252469)
+ 71360487 × 9 that is equal 642244383
+ 71360487 × 60 producing 4281629220
+ 71360487 × 400 that results in 28544194800
+ 71360487 × 2000 what gives us 142720974000
+ 71360487 × 50000 yielding 3568024350000
+ 71360487 × 200000 what gives us 14272097400000
+ 71360487 × 4000000 that results in 285441948000000
+ 71360487 × 60000000 giving us 4281629220000000

= 4585087478792403
