We look at the division of 80164923 by 20 
We're looking to find how many times 20 goes into 80164923.

Moving on to step 1:
If we divide 8 by 20, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 20

Moving on to step 2:
The number 20 fits into 80 4 times, leaving a remainder of 0.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 80 from 80 to get 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 20

Let's proceed to step 3:
1 divided by 20 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 20

Advancing to step 4:
The number 20 fits into 16 0 times, leaving a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 400.0
The remainder is 16 after subtracting 0 from 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 20

Moving on to step 5:
The number 20 fits into 164 8 times, leaving a remainder of 4.
The next digit of our result is 8. 
Result so far: 4008.0
Deduct 160 from 164 and we're left with 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 20

Moving on to step 6:
The number 20 fits into 49 2 times, leaving a remainder of 9.
Use 2 as the next digit of our solution. 
Result so far: 40082.0
The remainder is 9 after subtracting 40 from 49.
Include the next digit (2) from the dividend after 9, then repeat: 92 / 20

Step 7:
92 divided by 20 is 4 with a remainder of 12.
The next digit of our result is 4. 
Result so far: 400824.0
Deduct 80 from 92 and we're left with 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 20

On to step 8:
The number 20 fits into 123 6 times, leaving a remainder of 3.
The next digit of our result is 6. 
Result so far: 4008246.0
The remainder is 3 after subtracting 120 from 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 9:
20 goes into 30 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 4008246.1
Subtracting 20 from 30 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
When dividing 100 by 20, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 4008246.15
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 11:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 4008246.15
If we subtract 0 from 0, we 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.

On to step 12:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4008246.15
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 outcome is 4008246.15, with a leftover of 0.0.