Alright, let's work through 64320384 times 42804082 step by step
64320384 × 42804082 = 42804082 × (64320384)
+ 42804082 × 4 yielding 171216328
+ 42804082 × 80 that equals 3424326560
+ 42804082 × 300 resulting in 12841224600
+ 42804082 × 0000 resulting in 0
+ 42804082 × 20000 resulting in 856081640000
+ 42804082 × 300000 yielding 12841224600000
+ 42804082 × 4000000 giving us 171216328000000
+ 42804082 × 60000000 yielding 2568244920000000

= 2753174991007488
