We look at the division of 972109 by 21 
Our goal is to divide 972109 by 21.

Going ahead to step 1:
If we divide 9 by 21, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 21

Going ahead to step 2:
If we divide 97 by 21, we get 4 and a remainder of 13.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 84 away from 97, we end up with 13.
Take the next digit (2) from the dividend and append it to 13, then repeat: 132 / 21

Moving on to step 3:
21 goes into 132 6 times with a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 46.0
The remainder is 6 after subtracting 126 from 132.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 21

Advancing to step 4:
21 can be fit into 61 2 times, resulting in a remainder of 19.
Use 2 as the next digit of our solution. 
Result so far: 462.0
If we take 42 away from 61, we end up with 19.
Bring next digit (0) of the dividend behind the 19 and repeat the process: 190 / 21

Going ahead to step 5:
The number 21 fits into 190 9 times, leaving a remainder of 1.
The next digit of our result is 9. 
Result so far: 4629.0
Subtract 189 from 190 to get 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 21

Moving on to step 6:
The number 21 fits into 19 0 times, leaving a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 46290.0
The remainder is 19 after subtracting 0 from 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 7:
The number 21 fits into 190 9 times, leaving a remainder of 1.
The next digit of our result is 9. 
Result so far: 46290.9
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 8:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 46290.9
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 46290.904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 10:
160 divided by 21 is 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 46290.9047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 11:
130 divided by 21 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 46290.90476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 12:
21 goes into 40 1 times with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 46290.904761
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 13:
190 divided by 21 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 46290.9047619
If we take 189 away from 190, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 14:
10 divided by 21 is 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 46290.9047619
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 46290.9047619 with a remaining 1e-08.