No problem, we've got 19929973 and 20999022 to multiply
19929973 × 20999022 = 20999022 × (19929973)
+ 20999022 × 3 which equals 62997066
+ 20999022 × 70 that is equal 1469931540
+ 20999022 × 900 resulting in 18899119800
+ 20999022 × 9000 resulting in 188991198000
+ 20999022 × 20000 what gives us 419980440000
+ 20999022 × 900000 that results in 18899119800000
+ 20999022 × 9000000 giving us 188991198000000
+ 20999022 × 10000000 what gives us 209990220000000

= 418509941486406
