Alright, let's work through 64042665 times 53635118 step by step
64042665 × 53635118 = 53635118 × (64042665)
+ 53635118 × 5 which equals 268175590
+ 53635118 × 60 yielding 3218107080
+ 53635118 × 600 yielding 32181070800
+ 53635118 × 2000 that is equal 107270236000
+ 53635118 × 40000 yielding 2145404720000
+ 53635118 × 000000 that equals 0
+ 53635118 × 4000000 that results in 214540472000000
+ 53635118 × 60000000 that is equal 3218107080000000

= 3434935894309470
