942003 ÷ 21 
We're looking to find how many times 21 goes into 942003.

On to step 1:
When dividing 9 by 21, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Include the next digit (4) from the dividend after 9, then repeat: 94 / 21

Step 2:
21 can be fit into 94 4 times, resulting in a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 84 from 94 leaves us with 10.
Take the next digit (2) from the dividend and append it to 10, then repeat: 102 / 21

Step 3:
The number 21 fits into 102 4 times, leaving a remainder of 18.
Write down 4 as next digit of the result. 
Result so far: 44.0
Deduct 84 from 102 and we're left with 18.
Take the next digit (0) from the dividend and append it to 18, then repeat: 180 / 21

Moving on to step 4:
21 goes into 180 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 448.0
The remainder is 12 after subtracting 168 from 180.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 21

Going ahead to step 5:
The number 21 fits into 120 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 4485.0
Subtract 105 from 120 to get 15.
Include the next digit (3) from the dividend after 15, then repeat: 153 / 21

Let's proceed to step 6:
If we divide 153 by 21, we get 7 and a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 44857.0
The remainder is 6 after subtracting 147 from 153.
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 7:
21 goes into 60 2 times with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 44857.2
Subtracting 42 from 60 leaves us 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.

On to step 8:
If we divide 180 by 21, we get 8 and a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 44857.28
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
If we divide 120 by 21, we get 5 and a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 44857.285
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.

Going ahead to step 10:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 44857.2857
If we take 147 away from 150, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 11:
The number 21 fits into 30 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 44857.28571
If we take 21 away from 30, we end up 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.

Step 12:
90 divided by 21 is 4 with a remainder of 6.
The next digit of our result is 4. 
Result so far: 44857.285714
Subtract 84 from 90 to 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.

Let's proceed to step 13:
When dividing 60 by 21, we get 2 with a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 44857.2857142
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.

Advancing to step 14:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 44857.28571428
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

In conclusion, the division gives 44857.28571428 with a balance of 1.2e-08.