We look at the division of 972159 by 20 
We want to figure out the number of times 972159 can be divided by 20.

Step 1:
20 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 20

Going ahead to step 2:
When dividing 97 by 20, we get 4 with a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 80 from 97, we get 17.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 20

Advancing to step 3:
20 can be fit into 172 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 48.0
The remainder is 12 after subtracting 160 from 172.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 20

On to step 4:
If we divide 121 by 20, we get 6 and a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 486.0
The remainder is 1 after subtracting 120 from 121.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 20

On to step 5:
If we divide 15 by 20, we get 0 and a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 4860.0
Subtracting 0 from 15 leaves us with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 20

On to step 6:
If we divide 159 by 20, we get 7 and a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 48607.0
Subtracting 140 from 159 leaves us 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.

Going ahead to step 7:
The number 20 fits into 190 9 times, leaving a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 48607.9
If we subtract 180 from 190, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
When dividing 100 by 20, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 48607.95
Subtracting 100 from 100 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 48607.95
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 48607.95
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 48607.95, with a leftover of 0.0.