393010 ÷ 99 
We want to figure out the number of times 393010 can be divided by 99.

Going ahead to step 1:
99 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 99

Going ahead to step 2:
If we divide 39 by 99, we get 0 and a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Include the next digit (3) from the dividend after 39, then repeat: 393 / 99

Going ahead to step 3:
If we divide 393 by 99, we get 3 and a remainder of 96.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 297 away from 393, we end up with 96.
Append the next digit (0) from the dividend to 96 and continue with: 960 / 99

On to step 4:
If we divide 960 by 99, we get 9 and a remainder of 69.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
The remainder is 69 after subtracting 891 from 960.
Take the next digit (1) from the dividend and append it to 69, then repeat: 691 / 99

Advancing to step 5:
When dividing 691 by 99, we get 6 with a remainder of 97.
The number 6 becomes the next digit in our result. 
Result so far: 396.0
If we take 594 away from 691, we end up with 97.
Fetch the next digit (0) from the dividend, attach it to 97 and continue: 970 / 99

Advancing to step 6:
When dividing 970 by 99, we get 9 with a remainder of 79.
Put 9 as the next digit of the answer. 
Result so far: 3969.0
Subtract 891 from 970 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 7:
790 divided by 99 is 7 with a remainder of 97.
Record the quotient 7 as the next digit in the result. 
Result so far: 3969.7
Deduct 693 from 790 and we're left with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Advancing to step 8:
When dividing 970 by 99, we get 9 with a remainder of 79.
Write down 9 as next digit of the result. 
Result so far: 3969.79
The remainder is 79 after subtracting 891 from 970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 9:
If we divide 790 by 99, we get 7 and a remainder of 97.
Write down 7 as next digit of the result. 
Result so far: 3969.797
Subtract 693 from 790 to get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Moving on to step 10:
If we divide 970 by 99, we get 9 and a remainder of 79.
Write down 9 as next digit of the result. 
Result so far: 3969.7979
If we subtract 891 from 970, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 11:
790 divided by 99 is 7 with a remainder of 97.
Write down 7 as next digit of the result. 
Result so far: 3969.79797
Subtract 693 from 790 to get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Advancing to step 12:
970 divided by 99 is 9 with a remainder of 79.
Write down 9 as next digit of the result. 
Result so far: 3969.797979
Subtracting 891 from 970 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 13:
If we divide 790 by 99, we get 7 and a remainder of 97.
Put 7 as the next digit of the answer. 
Result so far: 3969.7979797
If we subtract 693 from 790, we get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

On to step 14:
99 can be fit into 970 9 times, resulting in a remainder of 79.
The next digit of our result is 9. 
Result so far: 3969.79797979
Deduct 891 from 970 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

The final outcome is 3969.79797979, with a leftover of 7.9e-08.