Alright, let's work through 3109 times 6871 step by step
3109 × 6871 = 6871 × (3109)
+ 6871 × 9 which equals 61839
+ 6871 × 00 that results in 0
+ 6871 × 100 yielding 687100
+ 6871 × 3000 that equals 20613000

= 21361939
