691579 divided by 21 
Let's see how many times 21 fits into 691579.

Going ahead to step 1:
6 divided by 21 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 21

Step 2:
The number 21 fits into 69 3 times, leaving a remainder of 6.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 63 from 69 to get 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 21

Advancing to step 3:
61 divided by 21 is 2 with a remainder of 19.
Put 2 as the next digit of the answer. 
Result so far: 32.0
Deduct 42 from 61 and we're left with 19.
Bring next digit (5) of the dividend behind the 19 and repeat the process: 195 / 21

Moving on to step 4:
21 goes into 195 9 times with a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 329.0
If we take 189 away from 195, we end up with 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 21

On to step 5:
21 goes into 67 3 times with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 3293.0
If we take 63 away from 67, we end up with 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 21

Moving on to step 6:
If we divide 49 by 21, we get 2 and a remainder of 7.
Put 2 as the next digit of the answer. 
Result so far: 32932.0
Deduct 42 from 49 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
If we divide 70 by 21, we get 3 and a remainder of 7.
The next digit of our result is 3. 
Result so far: 32932.3
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 8:
21 can be fit into 70 3 times, resulting in a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 32932.33
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 32932.33 with a remaining 0.007.