Alright, let's work through 6915 times 2957 step by step
6915 × 2957 = 2957 × (6915)
+ 2957 × 5 what gives us 14785
+ 2957 × 10 what gives us 29570
+ 2957 × 900 producing 2661300
+ 2957 × 6000 producing 17742000

= 20447655
