Alright, let's work through 6335 times 3503 step by step
6335 × 3503 = 3503 × (6335)
+ 3503 × 5 that equals 17515
+ 3503 × 30 giving us 105090
+ 3503 × 300 that is equal 1050900
+ 3503 × 6000 producing 21018000

= 22191505
