Alright, let's work through 2187 times 8539 step by step
2187 × 8539 = 8539 × (2187)
+ 8539 × 7 what gives us 59773
+ 8539 × 80 that equals 683120
+ 8539 × 100 that is equal 853900
+ 8539 × 2000 yielding 17078000

= 18674793
