Alright, let's work through 6366 times 6379 step by step
6366 × 6379 = 6379 × (6366)
+ 6379 × 6 that is equal 38274
+ 6379 × 60 giving us 382740
+ 6379 × 300 what gives us 1913700
+ 6379 × 6000 which equals 38274000

= 40608714
