Alright, let's work through 3171 times 728 step by step
3171 × 728 = 728 × (3171)
+ 728 × 1 that results in 728
+ 728 × 70 that results in 50960
+ 728 × 100 that results in 72800
+ 728 × 3000 producing 2184000

= 2308488
