Alright, let's work through 2355 times 5531 step by step
2355 × 5531 = 5531 × (2355)
+ 5531 × 5 what gives us 27655
+ 5531 × 50 producing 276550
+ 5531 × 300 yielding 1659300
+ 5531 × 2000 yielding 11062000

= 13025505
