Alright, let's work through 2136 times 5807 step by step
2136 × 5807 = 5807 × (2136)
+ 5807 × 6 giving us 34842
+ 5807 × 30 what gives us 174210
+ 5807 × 100 that results in 580700
+ 5807 × 2000 which equals 11614000

= 12403752
