Alright, let's work through 64473065 times 67739810 step by step
64473065 × 67739810 = 67739810 × (64473065)
+ 67739810 × 5 that is equal 338699050
+ 67739810 × 60 that is equal 4064388600
+ 67739810 × 000 resulting in 0
+ 67739810 × 3000 that equals 203219430000
+ 67739810 × 70000 yielding 4741786700000
+ 67739810 × 400000 which equals 27095924000000
+ 67739810 × 4000000 giving us 270959240000000
+ 67739810 × 60000000 that results in 4064388600000000

= 4367393173217650
