Alright, let's work through 3503 times 9960 step by step
3503 × 9960 = 9960 × (3503)
+ 9960 × 3 that results in 29880
+ 9960 × 00 yielding 0
+ 9960 × 500 that results in 4980000
+ 9960 × 3000 which equals 29880000

= 34889880
