Alright, let's work through 21006330 times 53806853 step by step
21006330 × 53806853 = 53806853 × (21006330)
+ 53806853 × 0 giving us 0
+ 53806853 × 30 that is equal 1614205590
+ 53806853 × 300 yielding 16142055900
+ 53806853 × 6000 that equals 322841118000
+ 53806853 × 00000 yielding 0
+ 53806853 × 000000 producing 0
+ 53806853 × 1000000 that results in 53806853000000
+ 53806853 × 20000000 producing 1076137060000000

= 1130284510379490
