442943 divided by 21 
Let's see how many times 21 fits into 442943.

Going ahead to step 1:
21 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 21

Going ahead to step 2:
21 can be fit into 44 2 times, resulting in a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 42 from 44, we get 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 21

Going ahead to step 3:
22 divided by 21 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 21.0
If we subtract 21 from 22, we get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 21

Going ahead to step 4:
If we divide 19 by 21, we get 0 and a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 210.0
If we take 0 away from 19, we end up with 19.
Append the next digit (4) from the dividend to 19 and continue with: 194 / 21

Going ahead to step 5:
21 goes into 194 9 times with a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 2109.0
If we subtract 189 from 194, we get 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 21

Advancing to step 6:
53 divided by 21 is 2 with a remainder of 11.
Put 2 as the next digit of the answer. 
Result so far: 21092.0
If we take 42 away from 53, 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.

Moving on to step 7:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 21092.5
Deduct 105 from 110 and we're left 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.

Advancing to step 8:
When dividing 50 by 21, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 21092.52
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.

Going ahead to step 9:
21 can be fit into 80 3 times, resulting in a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 21092.523
Subtracting 63 from 80 leaves us 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.

Step 10:
170 divided by 21 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 21092.5238
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
When dividing 20 by 21, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 21092.5238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 21092.523809
If we subtract 189 from 200, we 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.

Moving on to step 13:
21 can be fit into 110 5 times, resulting in a remainder of 5.
The next digit of our result is 5. 
Result so far: 21092.5238095
Deduct 105 from 110 and we're left 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.

Going ahead to step 14:
21 can be fit into 50 2 times, resulting in a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 21092.52380952
Subtract 42 from 50 to get 8.
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 result is 21092.52380952 with a remainder of 8e-09.