Alright, let's work through 62820103 times 21291388 step by step
62820103 × 21291388 = 21291388 × (62820103)
+ 21291388 × 3 yielding 63874164
+ 21291388 × 00 that is equal 0
+ 21291388 × 100 giving us 2129138800
+ 21291388 × 0000 that is equal 0
+ 21291388 × 20000 giving us 425827760000
+ 21291388 × 800000 what gives us 17033110400000
+ 21291388 × 2000000 producing 42582776000000
+ 21291388 × 60000000 resulting in 1277483280000000

= 1337527187172964
