Alright, let's work through 6689 times 6047 step by step
6689 × 6047 = 6047 × (6689)
+ 6047 × 9 what gives us 54423
+ 6047 × 80 resulting in 483760
+ 6047 × 600 which equals 3628200
+ 6047 × 6000 producing 36282000

= 40448383
