Alright, let's work through 2086 times 5842 step by step
2086 × 5842 = 5842 × (2086)
+ 5842 × 6 that equals 35052
+ 5842 × 80 giving us 467360
+ 5842 × 000 which equals 0
+ 5842 × 2000 producing 11684000

= 12186412
