Alright, let's work through 6831 times 6340 step by step
6831 × 6340 = 6340 × (6831)
+ 6340 × 1 what gives us 6340
+ 6340 × 30 which equals 190200
+ 6340 × 800 what gives us 5072000
+ 6340 × 6000 what gives us 38040000

= 43308540
