Alright, let's work through 21463450 times 29778421 step by step
21463450 × 29778421 = 29778421 × (21463450)
+ 29778421 × 0 yielding 0
+ 29778421 × 50 that is equal 1488921050
+ 29778421 × 400 yielding 11911368400
+ 29778421 × 3000 giving us 89335263000
+ 29778421 × 60000 producing 1786705260000
+ 29778421 × 400000 producing 11911368400000
+ 29778421 × 1000000 giving us 29778421000000
+ 29778421 × 20000000 producing 595568420000000

= 639147650212450
