479979 ÷ 20 
We're looking to find how many times 20 goes into 479979.

Advancing to step 1:
4 divided by 20 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (7) from the dividend to 4 and continue with: 47 / 20

Let's proceed to step 2:
When dividing 47 by 20, we get 2 with a remainder of 7.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 40 from 47, we get 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 20

Let's proceed to step 3:
The number 20 fits into 79 3 times, leaving a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we subtract 60 from 79, we get 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 20

Step 4:
20 can be fit into 199 9 times, resulting in a remainder of 19.
Record the quotient 9 as the next digit in the result. 
Result so far: 239.0
Subtract 180 from 199 to get 19.
Fetch the next digit (7) from the dividend, attach it to 19 and continue: 197 / 20

Moving on to step 5:
20 can be fit into 197 9 times, resulting in a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 2399.0
The remainder is 17 after subtracting 180 from 197.
Append the next digit (9) from the dividend to 17 and continue with: 179 / 20

On to step 6:
179 divided by 20 is 8 with a remainder of 19.
Put 8 as the next digit of the answer. 
Result so far: 23998.0
The remainder is 19 after subtracting 160 from 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 7:
190 divided by 20 is 9 with a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 23998.9
Subtract 180 from 190 to 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.

Let's proceed to step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 23998.95
The remainder is 0 after subtracting 100 from 100.
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:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 23998.95
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.

Moving on to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 23998.95
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.

Our division results in 23998.95 with a remaining 0.0.