84126 ÷ 5 = 16825 R1
Let's divide 84126 by 5.

Step 1:
5 goes into 8 1 times with a remainder of 3.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 5 from 8 to get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 5

Step 2:
5 goes into 34 6 times with a remainder of 4.
Write down 6 as next digit of of the result. 
Result so far: 16
Subtract 30 from 34 to get 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 5

Step 3:
5 goes into 41 8 times with a remainder of 1.
Write down 8 as next digit of of the result. 
Result so far: 168
Subtract 40 from 41 to get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 5

Step 4:
5 goes into 12 2 times with a remainder of 2.
Write down 2 as next digit of of the result. 
Result so far: 1682
Subtract 10 from 12 to get 2.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 5

Step 5:
5 goes into 26 5 times with a remainder of 1.
Write down 5 as next digit of of the result. 
Result so far: 16825
Subtract 25 from 26 to get 1.

The final result is 16825 with a remainder of 1.