939464 ÷ 21 
Let's see how many times 21 fits into 939464.

Let's proceed to step 1:
The number 21 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 21

Moving on to step 2:
When dividing 93 by 21, we get 4 with a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 84 from 93 leaves us with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 21

Going ahead to step 3:
When dividing 99 by 21, we get 4 with a remainder of 15.
The number 4 becomes the next digit in our result. 
Result so far: 44.0
Deduct 84 from 99 and we're left with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 21

Step 4:
154 divided by 21 is 7 with a remainder of 7.
The next digit of our result is 7. 
Result so far: 447.0
If we subtract 147 from 154, we get 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 21

Let's proceed to step 5:
When dividing 76 by 21, we get 3 with a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 4473.0
If we take 63 away from 76, we end up with 13.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 21

On to step 6:
21 goes into 134 6 times with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 44736.0
The remainder is 8 after subtracting 126 from 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 7:
80 divided by 21 is 3 with a remainder of 17.
The next digit of our result is 3. 
Result so far: 44736.3
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.

Let's proceed to step 8:
170 divided by 21 is 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 44736.38
Subtract 168 from 170 to 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.

Going ahead to step 9:
If we divide 20 by 21, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 44736.38
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
When dividing 200 by 21, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 44736.3809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 11:
If we divide 110 by 21, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 44736.38095
If we take 105 away from 110, we end up 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.

Step 12:
If we divide 50 by 21, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 44736.380952
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.

Step 13:
21 goes into 80 3 times with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 44736.3809523
Subtract 63 from 80 to 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.

Step 14:
170 divided by 21 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 44736.38095238
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.

The final outcome is 44736.38095238, with a leftover of 2e-09.