Let's divide 973203 by 21
We're looking to find how many times 21 goes into 973203.

Moving on to step 1:
The number 21 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 21

Moving on to step 2:
21 goes into 97 4 times with a remainder of 13.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 84 from 97 leaves us with 13.
Grab the next digit (3) from the dividend, add it to 13, then carry on: 133 / 21

Advancing to step 3:
21 goes into 133 6 times with a remainder of 7.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
Subtract 126 from 133 to get 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 21

Let's proceed to step 4:
21 can be fit into 72 3 times, resulting in a remainder of 9.
The next digit of our result is 3. 
Result so far: 463.0
The remainder is 9 after subtracting 63 from 72.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 21

On to step 5:
When dividing 90 by 21, we get 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 4634.0
The remainder is 6 after subtracting 84 from 90.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 21

Advancing to step 6:
63 divided by 21 is 3 with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 46343.0
Deduct 63 from 63 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
21 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 46343.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
If we divide 0 by 21, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 46343.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 46343.0, with a leftover of 0.0.