Alright, let's work through 21203063 times 83340926 step by step
21203063 × 83340926 = 83340926 × (21203063)
+ 83340926 × 3 which equals 250022778
+ 83340926 × 60 that results in 5000455560
+ 83340926 × 000 resulting in 0
+ 83340926 × 3000 producing 250022778000
+ 83340926 × 00000 that equals 0
+ 83340926 × 200000 resulting in 16668185200000
+ 83340926 × 1000000 which equals 83340926000000
+ 83340926 × 20000000 which equals 1666818520000000

= 1767082904456338
