126 ÷ 5 = 25 R1
Alright, let's work through the division of 126 by 5 step by step.

Step 1:
5 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 1 to get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 5

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

Step 3:
5 goes into 26 5 times with a remainder of 1.
Write down 5 as next digit of of the result. 
Result so far: 25
Subtract 25 from 26 to get 1.

The final result is 25 with a remainder of 1.