Alright, let's work through 2603 times 8223 step by step
2603 × 8223 = 8223 × (2603)
+ 8223 × 3 what gives us 24669
+ 8223 × 00 producing 0
+ 8223 × 600 what gives us 4933800
+ 8223 × 2000 that equals 16446000

= 21404469
