Alright, let's work through 16408462 times 68339563 step by step
16408462 × 68339563 = 68339563 × (16408462)
+ 68339563 × 2 yielding 136679126
+ 68339563 × 60 giving us 4100373780
+ 68339563 × 400 yielding 27335825200
+ 68339563 × 8000 that results in 546716504000
+ 68339563 × 00000 resulting in 0
+ 68339563 × 400000 producing 27335825200000
+ 68339563 × 6000000 that is equal 410037378000000
+ 68339563 × 10000000 yielding 683395630000000

= 1121347122582106
