21671 divided by 804 
We want to divide 21671 by 804.

On to step 1:
2 divided by 804 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 804

Let's proceed to step 2:
804 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Include the next digit (6) from the dividend after 21, then repeat: 216 / 804

Advancing to step 3:
804 goes into 216 0 times with a remainder of 216.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 216 and we're left with 216.
Take the next digit (7) from the dividend and append it to 216, then repeat: 2167 / 804

Step 4:
2167 divided by 804 is 2 with a remainder of 559.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 1608 from 2167, we get 559.
Take the next digit (1) from the dividend and append it to 559, then repeat: 5591 / 804

On to step 5:
804 goes into 5591 6 times with a remainder of 767.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Subtracting 4824 from 5591 leaves us with 767.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7670, and continue the process.

On to step 6:
The number 804 fits into 7670 9 times, leaving a remainder of 434.
Record the quotient 9 as the next digit in the result. 
Result so far: 26.9
If we take 7236 away from 7670, we end up with 434.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

Going ahead to step 7:
If we divide 4340 by 804, we get 5 and a remainder of 320.
Write down 5 as next digit of the result. 
Result so far: 26.95
Deduct 4020 from 4340 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 8:
804 can be fit into 3200 3 times, resulting in a remainder of 788.
Put 3 as the next digit of the answer. 
Result so far: 26.953
The remainder is 788 after subtracting 2412 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7880, and continue the process.

Step 9:
7880 divided by 804 is 9 with a remainder of 644.
Use 9 as the next digit of our solution. 
Result so far: 26.9539
Deduct 7236 from 7880 and we're left with 644.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6440, and continue the process.

Going ahead to step 10:
The number 804 fits into 6440 8 times, leaving a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 26.95398
The remainder is 8 after subtracting 6432 from 6440.
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 11:
804 can be fit into 80 0 times, resulting in a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 26.95398
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 12:
The number 804 fits into 800 0 times, leaving a remainder of 800.
Record the quotient 0 as the next digit in the result. 
Result so far: 26.95398
If we subtract 0 from 800, we get 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

In conclusion, the division gives 26.95398 with a balance of 8e-06.