390978 divided by 99 
We want to figure out the number of times 390978 can be divided by 99.

Going ahead to step 1:
3 divided by 99 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 99

Step 2:
When dividing 39 by 99, we get 0 with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Bring next digit (0) of the dividend behind the 39 and repeat the process: 390 / 99

Step 3:
390 divided by 99 is 3 with a remainder of 93.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 297 from 390 leaves us with 93.
Bring next digit (9) of the dividend behind the 93 and repeat the process: 939 / 99

Advancing to step 4:
939 divided by 99 is 9 with a remainder of 48.
Use 9 as the next digit of our solution. 
Result so far: 39.0
Deduct 891 from 939 and we're left with 48.
Take the next digit (7) from the dividend and append it to 48, then repeat: 487 / 99

Step 5:
487 divided by 99 is 4 with a remainder of 91.
Record the quotient 4 as the next digit in the result. 
Result so far: 394.0
Subtract 396 from 487 to get 91.
Append the next digit (8) from the dividend to 91 and continue with: 918 / 99

Let's proceed to step 6:
When dividing 918 by 99, we get 9 with a remainder of 27.
Use 9 as the next digit of our solution. 
Result so far: 3949.0
If we subtract 891 from 918, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 7:
99 goes into 270 2 times with a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 3949.2
If we subtract 198 from 270, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 8:
99 goes into 720 7 times with a remainder of 27.
The number 7 becomes the next digit in our result. 
Result so far: 3949.27
The remainder is 27 after subtracting 693 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 9:
When dividing 270 by 99, we get 2 with a remainder of 72.
Put 2 as the next digit of the answer. 
Result so far: 3949.272
Deduct 198 from 270 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 10:
99 goes into 720 7 times with a remainder of 27.
Write down 7 as next digit of the result. 
Result so far: 3949.2727
The remainder is 27 after subtracting 693 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 11:
99 can be fit into 270 2 times, resulting in a remainder of 72.
Put 2 as the next digit of the answer. 
Result so far: 3949.27272
Subtract 198 from 270 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 12:
720 divided by 99 is 7 with a remainder of 27.
Record the quotient 7 as the next digit in the result. 
Result so far: 3949.272727
The remainder is 27 after subtracting 693 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 13:
99 goes into 270 2 times with a remainder of 72.
Use 2 as the next digit of our solution. 
Result so far: 3949.2727272
The remainder is 72 after subtracting 198 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 14:
When dividing 720 by 99, we get 7 with a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 3949.27272727
If we take 693 away from 720, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

The final result is 3949.27272727 with a remainder of 2.7e-08.