Alright, let's work through 6621 times 5856 step by step
6621 × 5856 = 5856 × (6621)
+ 5856 × 1 what gives us 5856
+ 5856 × 20 resulting in 117120
+ 5856 × 600 what gives us 3513600
+ 5856 × 6000 giving us 35136000

= 38772576
