Alright, let's work through 6601 times 5603 step by step
6601 × 5603 = 5603 × (6601)
+ 5603 × 1 that equals 5603
+ 5603 × 00 that equals 0
+ 5603 × 600 which equals 3361800
+ 5603 × 6000 which equals 33618000

= 36985403
