342224 ÷ 21 
We want to figure out the number of times 342224 can be divided by 21.

Going ahead to step 1:
3 divided by 21 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 21

Moving on to step 2:
34 divided by 21 is 1 with a remainder of 13.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 21 away from 34, we end up with 13.
Include the next digit (2) from the dividend after 13, then repeat: 132 / 21

Let's proceed to step 3:
21 can be fit into 132 6 times, resulting in a remainder of 6.
The next digit of our result is 6. 
Result so far: 16.0
If we subtract 126 from 132, we get 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 21

Step 4:
The number 21 fits into 62 2 times, leaving a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 162.0
If we subtract 42 from 62, we get 20.
Take the next digit (2) from the dividend and append it to 20, then repeat: 202 / 21

Step 5:
The number 21 fits into 202 9 times, leaving a remainder of 13.
Put 9 as the next digit of the answer. 
Result so far: 1629.0
The remainder is 13 after subtracting 189 from 202.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 21

Advancing to step 6:
134 divided by 21 is 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 16296.0
Deduct 126 from 134 and we're left 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.

Let's proceed to step 7:
If we divide 80 by 21, we get 3 and a remainder of 17.
The next digit of our result is 3. 
Result so far: 16296.3
The remainder is 17 after subtracting 63 from 80.
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 8:
If we divide 170 by 21, we get 8 and a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 16296.38
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.

Moving on to step 9:
21 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 16296.38
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 10:
21 goes into 200 9 times with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 16296.3809
Deduct 189 from 200 and we're left 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.

Step 11:
110 divided by 21 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 16296.38095
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 12:
If we divide 50 by 21, we get 2 and a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 16296.380952
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.

On to step 13:
21 goes into 80 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 16296.3809523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 14:
170 divided by 21 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 16296.38095238
Deduct 168 from 170 and we're left 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.

The final result is 16296.38095238 with a remainder of 2e-09.