Let's divide 21138 by 26
We want to divide 21138 by 26.

Moving on to step 1:
When dividing 2 by 26, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 26

Moving on to step 2:
The number 26 fits into 21 0 times, leaving a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 26

Advancing to step 3:
211 divided by 26 is 8 with a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 208 from 211, we get 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 26

Going ahead to step 4:
The number 26 fits into 33 1 times, leaving a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 81.0
Subtract 26 from 33 to get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 26

Advancing to step 5:
The number 26 fits into 78 3 times, leaving a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 813.0
Deduct 78 from 78 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 6:
The number 26 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 813.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
26 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 813.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 813.0 with a remainder of 0.0.