Alright, let's work through 3185 times 6872 step by step
3185 × 6872 = 6872 × (3185)
+ 6872 × 5 which equals 34360
+ 6872 × 80 yielding 549760
+ 6872 × 100 yielding 687200
+ 6872 × 3000 giving us 20616000

= 21887320
