We look at the division of 99978789 by 478 
We want to figure out the number of times 99978789 can be divided by 478.

Going ahead to step 1:
478 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 478

On to step 2:
The number 478 fits into 99 0 times, leaving a remainder of 99.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Append the next digit (9) from the dividend to 99 and continue with: 999 / 478

Going ahead to step 3:
999 divided by 478 is 2 with a remainder of 43.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 956 from 999 leaves us with 43.
Bring next digit (7) of the dividend behind the 43 and repeat the process: 437 / 478

Moving on to step 4:
478 can be fit into 437 0 times, resulting in a remainder of 437.
Use 0 as the next digit of our solution. 
Result so far: 20.0
If we take 0 away from 437, we end up with 437.
Fetch the next digit (8) from the dividend, attach it to 437 and continue: 4378 / 478

Let's proceed to step 5:
4378 divided by 478 is 9 with a remainder of 76.
The number 9 becomes the next digit in our result. 
Result so far: 209.0
The remainder is 76 after subtracting 4302 from 4378.
Take the next digit (7) from the dividend and append it to 76, then repeat: 767 / 478

Step 6:
If we divide 767 by 478, we get 1 and a remainder of 289.
Use 1 as the next digit of our solution. 
Result so far: 2091.0
Subtract 478 from 767 to get 289.
Fetch the next digit (8) from the dividend, attach it to 289 and continue: 2898 / 478

Moving on to step 7:
When dividing 2898 by 478, we get 6 with a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 20916.0
If we take 2868 away from 2898, we end up with 30.
Append the next digit (9) from the dividend to 30 and continue with: 309 / 478

Let's proceed to step 8:
If we divide 309 by 478, we get 0 and a remainder of 309.
The number 0 becomes the next digit in our result. 
Result so far: 209160.0
The remainder is 309 after subtracting 0 from 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Moving on to step 9:
478 goes into 3090 6 times with a remainder of 222.
Use 6 as the next digit of our solution. 
Result so far: 209160.6
The remainder is 222 after subtracting 2868 from 3090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Step 10:
The number 478 fits into 2220 4 times, leaving a remainder of 308.
The next digit of our result is 4. 
Result so far: 209160.64
If we subtract 1912 from 2220, we get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

On to step 11:
If we divide 3080 by 478, we get 6 and a remainder of 212.
Use 6 as the next digit of our solution. 
Result so far: 209160.646
The remainder is 212 after subtracting 2868 from 3080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

On to step 12:
478 goes into 2120 4 times with a remainder of 208.
Record the quotient 4 as the next digit in the result. 
Result so far: 209160.6464
If we subtract 1912 from 2120, we get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 13:
The number 478 fits into 2080 4 times, leaving a remainder of 168.
Write down 4 as next digit of the result. 
Result so far: 209160.64644
Deduct 1912 from 2080 and we're left with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

After the division, we end up with 209160.64644 and a remainder of 0.000168.