Alright, let's work through 5210 times 3864 step by step
5210 × 3864 = 3864 × (5210)
+ 3864 × 0 that is equal 0
+ 3864 × 10 that results in 38640
+ 3864 × 200 yielding 772800
+ 3864 × 5000 giving us 19320000

= 20131440
