Alright, let's work through 3181 times 5394 step by step
3181 × 5394 = 5394 × (3181)
+ 5394 × 1 what gives us 5394
+ 5394 × 80 which equals 431520
+ 5394 × 100 that equals 539400
+ 5394 × 3000 resulting in 16182000

= 17158314
