Alright, let's work through 2011 times 1553 step by step
2011 × 1553 = 1553 × (2011)
+ 1553 × 1 that is equal 1553
+ 1553 × 10 resulting in 15530
+ 1553 × 000 producing 0
+ 1553 × 2000 producing 3106000

= 3123083
