Alright, let's work through 21007406 times 4783964 step by step
21007406 × 4783964 = 4783964 × (21007406)
+ 4783964 × 6 giving us 28703784
+ 4783964 × 00 resulting in 0
+ 4783964 × 400 that equals 1913585600
+ 4783964 × 7000 resulting in 33487748000
+ 4783964 × 00000 resulting in 0
+ 4783964 × 000000 producing 0
+ 4783964 × 1000000 yielding 4783964000000
+ 4783964 × 20000000 yielding 95679280000000

= 100498674037384
