Alright, let's work through 64809119 times 10272491 step by step
64809119 × 10272491 = 10272491 × (64809119)
+ 10272491 × 9 giving us 92452419
+ 10272491 × 10 that is equal 102724910
+ 10272491 × 100 yielding 1027249100
+ 10272491 × 9000 that results in 92452419000
+ 10272491 × 00000 that is equal 0
+ 10272491 × 800000 that results in 8217992800000
+ 10272491 × 4000000 what gives us 41089964000000
+ 10272491 × 60000000 yielding 616349460000000

= 665751091645429
