Alright, let's work through 3171 times 6411 step by step
3171 × 6411 = 6411 × (3171)
+ 6411 × 1 that is equal 6411
+ 6411 × 70 that is equal 448770
+ 6411 × 100 that results in 641100
+ 6411 × 3000 that results in 19233000

= 20329281
