We divide 269899 by 21
Let's see how many times 21 fits into 269899.

On to step 1:
2 divided by 21 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 21

Let's proceed to step 2:
If we divide 26 by 21, we get 1 and a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 21 from 26, we get 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 21

Step 3:
If we divide 59 by 21, we get 2 and a remainder of 17.
The next digit of our result is 2. 
Result so far: 12.0
Subtracting 42 from 59 leaves us with 17.
Take the next digit (8) from the dividend and append it to 17, then repeat: 178 / 21

Step 4:
The number 21 fits into 178 8 times, leaving a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 128.0
Subtract 168 from 178 to get 10.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 21

Step 5:
21 can be fit into 109 5 times, resulting in a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 1285.0
Deduct 105 from 109 and we're left with 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 21

Moving on to step 6:
When dividing 49 by 21, we get 2 with a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 12852.0
If we take 42 away from 49, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
21 goes into 70 3 times with a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 12852.3
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
When dividing 70 by 21, we get 3 with a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 12852.33
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final outcome is 12852.33, with a leftover of 0.007.