Alright, let's work through 6878 times 4511 step by step
6878 × 4511 = 4511 × (6878)
+ 4511 × 8 that results in 36088
+ 4511 × 70 that equals 315770
+ 4511 × 800 that results in 3608800
+ 4511 × 6000 what gives us 27066000

= 31026658
