We're going to solve 20007840 multiplied by 21432454
20007840 × 21432454 = 21432454 × (20007840)
+ 21432454 × 0 producing 0
+ 21432454 × 40 resulting in 857298160
+ 21432454 × 800 producing 17145963200
+ 21432454 × 7000 that results in 150027178000
+ 21432454 × 00000 resulting in 0
+ 21432454 × 000000 which equals 0
+ 21432454 × 0000000 that is equal 0
+ 21432454 × 20000000 giving us 428649080000000

= 428817110439360
