Alright, let's work through 5878 times 3657 step by step
5878 × 3657 = 3657 × (5878)
+ 3657 × 8 that equals 29256
+ 3657 × 70 that is equal 255990
+ 3657 × 800 that results in 2925600
+ 3657 × 5000 giving us 18285000

= 21495846
