We look at the division of 947801 by 21 
Let's see how many times 21 fits into 947801.

Step 1:
21 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (4) from the dividend, add it to 9, then carry on: 94 / 21

Advancing to step 2:
The number 21 fits into 94 4 times, leaving a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtract 84 from 94 to get 10.
Take the next digit (7) from the dividend and append it to 10, then repeat: 107 / 21

Going ahead to step 3:
If we divide 107 by 21, we get 5 and a remainder of 2.
The next digit of our result is 5. 
Result so far: 45.0
Subtract 105 from 107 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 21

Advancing to step 4:
28 divided by 21 is 1 with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 451.0
The remainder is 7 after subtracting 21 from 28.
Take the next digit (0) from the dividend and append it to 7, then repeat: 70 / 21

Step 5:
70 divided by 21 is 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 4513.0
The remainder is 7 after subtracting 63 from 70.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 21

On to step 6:
If we divide 71 by 21, we get 3 and a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 45133.0
Deduct 63 from 71 and we're left with 8.
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 number 3 becomes the next digit in our result. 
Result so far: 45133.3
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 8:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The next digit of our result is 8. 
Result so far: 45133.38
Deduct 168 from 170 and we're left with 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:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 45133.38
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
21 goes into 200 9 times with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 45133.3809
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.

On to step 11:
When dividing 110 by 21, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 45133.38095
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.

Let's proceed to step 12:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 45133.380952
Deduct 42 from 50 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
80 divided by 21 is 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 45133.3809523
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.

Moving on to step 14:
When dividing 170 by 21, we get 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 45133.38095238
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.

Our division results in 45133.38095238 with a remaining 2e-09.