No problem, we've got 21221403 and 47091607 to multiply
21221403 × 47091607 = 47091607 × (21221403)
+ 47091607 × 3 giving us 141274821
+ 47091607 × 00 yielding 0
+ 47091607 × 400 giving us 18836642800
+ 47091607 × 1000 producing 47091607000
+ 47091607 × 20000 yielding 941832140000
+ 47091607 × 200000 producing 9418321400000
+ 47091607 × 1000000 giving us 47091607000000
+ 47091607 × 20000000 that results in 941832140000000

= 999349970064621
