Alright, let's work through 2836 times 3864 step by step
2836 × 3864 = 3864 × (2836)
+ 3864 × 6 producing 23184
+ 3864 × 30 that results in 115920
+ 3864 × 800 that equals 3091200
+ 3864 × 2000 giving us 7728000

= 10958304
