No problem, we've got 21009757 and 42111997 to multiply
21009757 × 42111997 = 42111997 × (21009757)
+ 42111997 × 7 yielding 294783979
+ 42111997 × 50 producing 2105599850
+ 42111997 × 700 what gives us 29478397900
+ 42111997 × 9000 that is equal 379007973000
+ 42111997 × 00000 which equals 0
+ 42111997 × 000000 yielding 0
+ 42111997 × 1000000 which equals 42111997000000
+ 42111997 × 20000000 resulting in 842239940000000

= 884762823754729
