Alright, let's work through 2851 times 7561 step by step
2851 × 7561 = 7561 × (2851)
+ 7561 × 1 yielding 7561
+ 7561 × 50 producing 378050
+ 7561 × 800 what gives us 6048800
+ 7561 × 2000 what gives us 15122000

= 21556411
