We look at the division of 433197 by 21 
We want to figure out the number of times 433197 can be divided by 21.

Step 1:
21 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 21

On to step 2:
21 goes into 43 2 times with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 42 from 43 leaves us with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 21

Going ahead to step 3:
When dividing 13 by 21, we get 0 with a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 20.0
Deduct 0 from 13 and we're left with 13.
Include the next digit (1) from the dividend after 13, then repeat: 131 / 21

Let's proceed to step 4:
The number 21 fits into 131 6 times, leaving a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 206.0
Subtracting 126 from 131 leaves us with 5.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 21

Advancing to step 5:
When dividing 59 by 21, we get 2 with a remainder of 17.
Use 2 as the next digit of our solution. 
Result so far: 2062.0
Deduct 42 from 59 and we're left with 17.
Grab the next digit (7) from the dividend, add it to 17, then carry on: 177 / 21

Going ahead to step 6:
177 divided by 21 is 8 with a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 20628.0
Subtract 168 from 177 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 20628.4
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
21 goes into 60 2 times with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 20628.42
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 9:
If we divide 180 by 21, we get 8 and a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 20628.428
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 10:
If we divide 120 by 21, we get 5 and a remainder of 15.
The next digit of our result is 5. 
Result so far: 20628.4285
If we take 105 away from 120, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 11:
150 divided by 21 is 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 20628.42857
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 12:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 20628.428571
Subtracting 21 from 30 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 13:
When dividing 90 by 21, we get 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 20628.4285714
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 14:
21 goes into 60 2 times with a remainder of 18.
The next digit of our result is 2. 
Result so far: 20628.42857142
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final outcome is 20628.42857142, with a leftover of 1.8e-08.