Alright, let's work through 6878 times 2642 step by step
6878 × 2642 = 2642 × (6878)
+ 2642 × 8 giving us 21136
+ 2642 × 70 giving us 184940
+ 2642 × 800 resulting in 2113600
+ 2642 × 6000 what gives us 15852000

= 18171676
