Alright, let's work through 1641 times 3171 step by step
1641 × 3171 = 3171 × (1641)
+ 3171 × 1 which equals 3171
+ 3171 × 40 that is equal 126840
+ 3171 × 600 giving us 1902600
+ 3171 × 1000 that results in 3171000

= 5203611
