We look at the division of 479878 by 20 
Let's see how many times 20 fits into 479878.

Moving on to step 1:
If we divide 4 by 20, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (7) from the dividend, attach it to 4 and continue: 47 / 20

Step 2:
47 divided by 20 is 2 with a remainder of 7.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 40 away from 47, we end up with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 20

Step 3:
When dividing 79 by 20, we get 3 with a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
Subtract 60 from 79 to get 19.
Include the next digit (8) from the dividend after 19, then repeat: 198 / 20

Going ahead to step 4:
The number 20 fits into 198 9 times, leaving a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 239.0
If we subtract 180 from 198, we get 18.
Append the next digit (7) from the dividend to 18 and continue with: 187 / 20

On to step 5:
The number 20 fits into 187 9 times, leaving a remainder of 7.
Write down 9 as next digit of the result. 
Result so far: 2399.0
Subtracting 180 from 187 leaves us with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 20

Going ahead to step 6:
If we divide 78 by 20, we get 3 and a remainder of 18.
Use 3 as the next digit of our solution. 
Result so far: 23993.0
Deduct 60 from 78 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
If we divide 180 by 20, we get 9 and a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 23993.9
If we subtract 180 from 180, 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.

Moving on to step 8:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 23993.9
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.

On to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 23993.9
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.

After the division, we end up with 23993.9 and a remainder of 0.0.