Alright, let's work through 1651 times 3131 step by step
1651 × 3131 = 3131 × (1651)
+ 3131 × 1 resulting in 3131
+ 3131 × 50 what gives us 156550
+ 3131 × 600 giving us 1878600
+ 3131 × 1000 what gives us 3131000

= 5169281
