Alright, let's work through 21297659 times 53755902 step by step
21297659 × 53755902 = 53755902 × (21297659)
+ 53755902 × 9 giving us 483803118
+ 53755902 × 50 yielding 2687795100
+ 53755902 × 600 which equals 32253541200
+ 53755902 × 7000 yielding 376291314000
+ 53755902 × 90000 which equals 4838031180000
+ 53755902 × 200000 producing 10751180400000
+ 53755902 × 1000000 that is equal 53755902000000
+ 53755902 × 20000000 what gives us 1075118040000000

= 1144874870033418
