Alright, let's work through 5587 times 2040 step by step
5587 × 2040 = 2040 × (5587)
+ 2040 × 7 producing 14280
+ 2040 × 80 producing 163200
+ 2040 × 500 that is equal 1020000
+ 2040 × 5000 that is equal 10200000

= 11397480
