42839 ÷ 7 = 6119 R6
We're going to perform division on 42839 with 7 as the divisor.

Step 1:
7 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 4 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 7

Step 2:
7 goes into 42 6 times with a remainder of 0.
Write down 6 as next digit of of the result. 
Result so far: 6
Subtract 42 from 42 to get 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 7

Step 3:
7 goes into 8 1 times with a remainder of 1.
Write down 1 as next digit of of the result. 
Result so far: 61
Subtract 7 from 8 to get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 7

Step 4:
7 goes into 13 1 times with a remainder of 6.
Write down 1 as next digit of of the result. 
Result so far: 611
Subtract 7 from 13 to get 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 7

Step 5:
7 goes into 69 9 times with a remainder of 6.
Write down 9 as next digit of of the result. 
Result so far: 6119
Subtract 63 from 69 to get 6.

The final result is 6119 with a remainder of 6.