We look at the division of 389978 by 99 
We're looking to find how many times 99 goes into 389978.

Going ahead to step 1:
3 divided by 99 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 99

Advancing to step 2:
38 divided by 99 is 0 with a remainder of 38.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 38, we end up with 38.
Grab the next digit (9) from the dividend, add it to 38, then carry on: 389 / 99

Step 3:
389 divided by 99 is 3 with a remainder of 92.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 92 after subtracting 297 from 389.
Fetch the next digit (9) from the dividend, attach it to 92 and continue: 929 / 99

Step 4:
The number 99 fits into 929 9 times, leaving a remainder of 38.
Use 9 as the next digit of our solution. 
Result so far: 39.0
Subtract 891 from 929 to get 38.
Bring next digit (7) of the dividend behind the 38 and repeat the process: 387 / 99

Advancing to step 5:
The number 99 fits into 387 3 times, leaving a remainder of 90.
Write down 3 as next digit of the result. 
Result so far: 393.0
Subtract 297 from 387 to get 90.
Bring next digit (8) of the dividend behind the 90 and repeat the process: 908 / 99

Step 6:
When dividing 908 by 99, we get 9 with a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 3939.0
If we subtract 891 from 908, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 7:
If we divide 170 by 99, we get 1 and a remainder of 71.
Use 1 as the next digit of our solution. 
Result so far: 3939.1
Deduct 99 from 170 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 8:
The number 99 fits into 710 7 times, leaving a remainder of 17.
The next digit of our result is 7. 
Result so far: 3939.17
Subtract 693 from 710 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 9:
The number 99 fits into 170 1 times, leaving a remainder of 71.
Write down 1 as next digit of the result. 
Result so far: 3939.171
The remainder is 71 after subtracting 99 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Going ahead to step 10:
If we divide 710 by 99, we get 7 and a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 3939.1717
Deduct 693 from 710 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 11:
99 goes into 170 1 times with a remainder of 71.
Record the quotient 1 as the next digit in the result. 
Result so far: 3939.17171
Subtract 99 from 170 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 12:
If we divide 710 by 99, we get 7 and a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 3939.171717
Subtracting 693 from 710 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 13:
When dividing 170 by 99, we get 1 with a remainder of 71.
The next digit of our result is 1. 
Result so far: 3939.1717171
If we subtract 99 from 170, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 14:
710 divided by 99 is 7 with a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 3939.17171717
Subtract 693 from 710 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

In conclusion, the division gives 3939.17171717 with a balance of 1.7e-08.