Let's divide 225250 by 21
Let's see how many times 21 fits into 225250.

On to step 1:
If we divide 2 by 21, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 21

Step 2:
When dividing 22 by 21, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
If we take 21 away from 22, we end up with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 21

On to step 3:
If we divide 15 by 21, we get 0 and a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 15 after subtracting 0 from 15.
Take the next digit (2) from the dividend and append it to 15, then repeat: 152 / 21

Advancing to step 4:
If we divide 152 by 21, we get 7 and a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 107.0
If we take 147 away from 152, we end up with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 21

Moving on to step 5:
55 divided by 21 is 2 with a remainder of 13.
Write down 2 as next digit of the result. 
Result so far: 1072.0
The remainder is 13 after subtracting 42 from 55.
Include the next digit (0) from the dividend after 13, then repeat: 130 / 21

Going ahead to step 6:
130 divided by 21 is 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 10726.0
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
40 divided by 21 is 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 10726.1
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 8:
21 goes into 190 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 10726.19
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
When dividing 10 by 21, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 10726.19
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
When dividing 100 by 21, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 10726.1904
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
If we divide 160 by 21, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 10726.19047
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 12:
21 goes into 130 6 times with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 10726.190476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 13:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 10726.1904761
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 14:
When dividing 190 by 21, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 10726.19047619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 10726.19047619, with a leftover of 1e-09.