We divide 395789 by 21
We want to divide 395789 by 21.

Step 1:
If we divide 3 by 21, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 21

Moving on to step 2:
When dividing 39 by 21, we get 1 with a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 21 from 39, we get 18.
Bring next digit (5) of the dividend behind the 18 and repeat the process: 185 / 21

Advancing to step 3:
If we divide 185 by 21, we get 8 and a remainder of 17.
Write down 8 as next digit of the result. 
Result so far: 18.0
Subtract 168 from 185 to get 17.
Bring next digit (7) of the dividend behind the 17 and repeat the process: 177 / 21

Going ahead to step 4:
If we divide 177 by 21, we get 8 and a remainder of 9.
Use 8 as the next digit of our solution. 
Result so far: 188.0
Deduct 168 from 177 and we're left with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 21

Advancing to step 5:
The number 21 fits into 98 4 times, leaving a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 1884.0
If we take 84 away from 98, we end up with 14.
Grab the next digit (9) from the dividend, add it to 14, then carry on: 149 / 21

Let's proceed to step 6:
The number 21 fits into 149 7 times, leaving a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 18847.0
Subtracting 147 from 149 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
If we divide 20 by 21, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 18847.0
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
21 goes into 200 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 18847.09
Subtract 189 from 200 to 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.

Moving on to step 9:
21 goes into 110 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 18847.095
Subtracting 105 from 110 leaves us with 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 10:
When dividing 50 by 21, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 18847.0952
Subtracting 42 from 50 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 11:
If we divide 80 by 21, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 18847.09523
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.

Step 12:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 18847.095238
If we subtract 168 from 170, we 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.

Step 13:
If we divide 20 by 21, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 18847.095238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 18847.09523809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The final outcome is 18847.09523809, with a leftover of 1.1e-08.