Alright, let's work through 19807330 times 21321838 step by step
19807330 × 21321838 = 21321838 × (19807330)
+ 21321838 × 0 that equals 0
+ 21321838 × 30 which equals 639655140
+ 21321838 × 300 giving us 6396551400
+ 21321838 × 7000 which equals 149252866000
+ 21321838 × 00000 that results in 0
+ 21321838 × 800000 which equals 17057470400000
+ 21321838 × 9000000 resulting in 191896542000000
+ 21321838 × 10000000 what gives us 213218380000000

= 422328681472540
