Alright, let's work through 6015 times 3502 step by step
6015 × 3502 = 3502 × (6015)
+ 3502 × 5 which equals 17510
+ 3502 × 10 that is equal 35020
+ 3502 × 000 yielding 0
+ 3502 × 6000 that is equal 21012000

= 21064530
