We divide 208171 by 21
We're looking to find how many times 21 goes into 208171.

Advancing to step 1:
If we divide 2 by 21, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 21

Moving on to step 2:
20 divided by 21 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Take the next digit (8) from the dividend and append it to 20, then repeat: 208 / 21

Step 3:
21 can be fit into 208 9 times, resulting in a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 189 from 208 and we're left with 19.
Fetch the next digit (1) from the dividend, attach it to 19 and continue: 191 / 21

Going ahead to step 4:
21 goes into 191 9 times with a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
Subtracting 189 from 191 leaves us with 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 21

Step 5:
27 divided by 21 is 1 with a remainder of 6.
The next digit of our result is 1. 
Result so far: 991.0
The remainder is 6 after subtracting 21 from 27.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 21

Step 6:
61 divided by 21 is 2 with a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 9912.0
If we subtract 42 from 61, we 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.

Step 7:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 9912.9
If we subtract 189 from 190, we 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.

Advancing to step 8:
21 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 9912.9
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
21 goes into 100 4 times with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 9912.904
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.

Let's proceed to step 10:
If we divide 160 by 21, we get 7 and a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 9912.9047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 11:
When dividing 130 by 21, we get 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 9912.90476
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.

Moving on to step 12:
21 can be fit into 40 1 times, resulting in a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 9912.904761
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.

Going ahead to step 13:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 9912.9047619
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 14:
If we divide 10 by 21, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 9912.9047619
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.

The final outcome is 9912.9047619, with a leftover of 1e-08.