Alright, let's work through 3135 times 6539 step by step
3135 × 6539 = 6539 × (3135)
+ 6539 × 5 producing 32695
+ 6539 × 30 that results in 196170
+ 6539 × 100 that equals 653900
+ 6539 × 3000 that results in 19617000

= 20499765
