947235 ÷ 21 
We're looking to find how many times 21 goes into 947235.

Moving on to step 1:
9 divided by 21 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 21

Advancing to step 2:
If we divide 94 by 21, we get 4 and a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 84 from 94 leaves us with 10.
Fetch the next digit (7) from the dividend, attach it to 10 and continue: 107 / 21

Step 3:
21 goes into 107 5 times with a remainder of 2.
The next digit of our result is 5. 
Result so far: 45.0
The remainder is 2 after subtracting 105 from 107.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 21

On to step 4:
21 can be fit into 22 1 times, resulting in a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 451.0
Subtracting 21 from 22 leaves us with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 21

Step 5:
The number 21 fits into 13 0 times, leaving a remainder of 13.
The next digit of our result is 0. 
Result so far: 4510.0
The remainder is 13 after subtracting 0 from 13.
Take the next digit (5) from the dividend and append it to 13, then repeat: 135 / 21

Step 6:
When dividing 135 by 21, we get 6 with a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 45106.0
The remainder is 9 after subtracting 126 from 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
21 goes into 90 4 times with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 45106.4
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 8:
When dividing 60 by 21, we get 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 45106.42
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.

Step 9:
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: 45106.428
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.

Step 10:
When dividing 120 by 21, we get 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 45106.4285
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 11:
150 divided by 21 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 45106.42857
Subtract 147 from 150 to 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.

Advancing 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: 45106.428571
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.

Advancing to step 13:
If we divide 90 by 21, we get 4 and a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 45106.4285714
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.

Step 14:
When dividing 60 by 21, we get 2 with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 45106.42857142
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.

The final result is 45106.42857142 with a remainder of 1.8e-08.