Alright, let's work through 5806 times 2105 step by step
5806 × 2105 = 2105 × (5806)
+ 2105 × 6 resulting in 12630
+ 2105 × 00 yielding 0
+ 2105 × 800 giving us 1684000
+ 2105 × 5000 that results in 10525000

= 12221630
