We look at the division of 183425 by 21 
Let's see how many times 21 fits into 183425.

Going ahead to step 1:
If we divide 1 by 21, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 21

Step 2:
If we divide 18 by 21, we get 0 and a remainder of 18.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Include the next digit (3) from the dividend after 18, then repeat: 183 / 21

Let's proceed to step 3:
The number 21 fits into 183 8 times, leaving a remainder of 15.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 168 from 183, we get 15.
Take the next digit (4) from the dividend and append it to 15, then repeat: 154 / 21

On to step 4:
21 goes into 154 7 times with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 87.0
The remainder is 7 after subtracting 147 from 154.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 21

Moving on to step 5:
The number 21 fits into 72 3 times, leaving a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 873.0
If we take 63 away from 72, we end up with 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 21

On to step 6:
21 goes into 95 4 times with a remainder of 11.
The next digit of our result is 4. 
Result so far: 8734.0
If we subtract 84 from 95, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
21 goes into 110 5 times with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 8734.5
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
21 can be fit into 50 2 times, resulting in a remainder of 8.
The next digit of our result is 2. 
Result so far: 8734.52
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
21 can be fit into 80 3 times, resulting in a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 8734.523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 10:
When dividing 170 by 21, we get 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 8734.5238
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
When dividing 20 by 21, we get 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 8734.5238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 12:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 8734.523809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 13:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 8734.5238095
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 14:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 8734.52380952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 8734.52380952 with a remainder of 8e-09.