323621 divided by 21 
We want to figure out the number of times 323621 can be divided by 21.

Going ahead to step 1:
If we divide 3 by 21, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 21

Going ahead to step 2:
21 goes into 32 1 times with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 21 from 32 to get 11.
Fetch the next digit (3) from the dividend, attach it to 11 and continue: 113 / 21

Advancing to step 3:
113 divided by 21 is 5 with a remainder of 8.
The next digit of our result is 5. 
Result so far: 15.0
Subtracting 105 from 113 leaves us with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 21

Going ahead to step 4:
21 goes into 86 4 times with a remainder of 2.
The next digit of our result is 4. 
Result so far: 154.0
If we subtract 84 from 86, we get 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 21

Advancing to step 5:
The number 21 fits into 22 1 times, leaving a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1541.0
The remainder is 1 after subtracting 21 from 22.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 21

Step 6:
11 divided by 21 is 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 15410.0
If we take 0 away from 11, 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.

Let's proceed to step 7:
21 goes into 110 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 15410.5
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.

Step 8:
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: 15410.52
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.

Advancing to step 9:
The number 21 fits into 80 3 times, leaving a remainder of 17.
The next digit of our result is 3. 
Result so far: 15410.523
Deduct 63 from 80 and we're left 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.

Let's proceed to step 10:
When dividing 170 by 21, we get 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 15410.5238
Subtracting 168 from 170 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.

On to step 11:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 15410.5238
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.

Step 12:
200 divided by 21 is 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 15410.523809
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.

Going ahead to step 13:
When dividing 110 by 21, we get 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 15410.5238095
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.

On to step 14:
21 goes into 50 2 times with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 15410.52380952
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 outcome is 15410.52380952, with a leftover of 8e-09.