872144 divided by 20 
We're looking to find how many times 20 goes into 872144.

Moving on to step 1:
8 divided by 20 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 20

On to step 2:
20 can be fit into 87 4 times, resulting in a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 80 from 87 and we're left with 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 20

Moving on to step 3:
20 can be fit into 72 3 times, resulting in a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
If we subtract 60 from 72, we get 12.
Append the next digit (1) from the dividend to 12 and continue with: 121 / 20

Going ahead to step 4:
20 can be fit into 121 6 times, resulting in a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 436.0
The remainder is 1 after subtracting 120 from 121.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 20

Advancing to step 5:
20 goes into 14 0 times with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 4360.0
Subtracting 0 from 14 leaves us with 14.
Bring next digit (4) of the dividend behind the 14 and repeat the process: 144 / 20

Advancing to step 6:
20 goes into 144 7 times with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 43607.0
The remainder is 4 after subtracting 140 from 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 7:
40 divided by 20 is 2 with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 43607.2
Subtracting 40 from 40 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.

Step 8:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 43607.2
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.

Let's proceed to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 43607.2
Subtracting 0 from 0 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.

The final result is 43607.2 with a remainder of 0.0.