Alright, let's work through 6402693 times 65742837 step by step
6402693 × 65742837 = 65742837 × (6402693)
+ 65742837 × 3 that is equal 197228511
+ 65742837 × 90 giving us 5916855330
+ 65742837 × 600 which equals 39445702200
+ 65742837 × 2000 giving us 131485674000
+ 65742837 × 00000 resulting in 0
+ 65742837 × 400000 that equals 26297134800000
+ 65742837 × 6000000 that is equal 394457022000000

= 420931202260041
