Alright, let's work through 6315 times 6436 step by step
6315 × 6436 = 6436 × (6315)
+ 6436 × 5 resulting in 32180
+ 6436 × 10 what gives us 64360
+ 6436 × 300 which equals 1930800
+ 6436 × 6000 giving us 38616000

= 40643340
