Alright, let's work through 2189 times 1236 step by step
2189 × 1236 = 1236 × (2189)
+ 1236 × 9 producing 11124
+ 1236 × 80 producing 98880
+ 1236 × 100 yielding 123600
+ 1236 × 2000 what gives us 2472000

= 2705604
