99391139 ÷ 199 
We want to figure out the number of times 99391139 can be divided by 199.

Going ahead to step 1:
If we divide 9 by 199, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 199

Step 2:
If we divide 99 by 199, we get 0 and a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Take the next digit (3) from the dividend and append it to 99, then repeat: 993 / 199

Step 3:
199 can be fit into 993 4 times, resulting in a remainder of 197.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 796 from 993 and we're left with 197.
Fetch the next digit (9) from the dividend, attach it to 197 and continue: 1979 / 199

On to step 4:
1979 divided by 199 is 9 with a remainder of 188.
Use 9 as the next digit of our solution. 
Result so far: 49.0
Subtracting 1791 from 1979 leaves us with 188.
Bring next digit (1) of the dividend behind the 188 and repeat the process: 1881 / 199

Step 5:
199 can be fit into 1881 9 times, resulting in a remainder of 90.
Use 9 as the next digit of our solution. 
Result so far: 499.0
Subtract 1791 from 1881 to get 90.
Fetch the next digit (1) from the dividend, attach it to 90 and continue: 901 / 199

Moving on to step 6:
901 divided by 199 is 4 with a remainder of 105.
Record the quotient 4 as the next digit in the result. 
Result so far: 4994.0
If we subtract 796 from 901, we get 105.
Bring next digit (3) of the dividend behind the 105 and repeat the process: 1053 / 199

Going ahead to step 7:
199 goes into 1053 5 times with a remainder of 58.
Record the quotient 5 as the next digit in the result. 
Result so far: 49945.0
Subtract 995 from 1053 to get 58.
Grab the next digit (9) from the dividend, add it to 58, then carry on: 589 / 199

Step 8:
If we divide 589 by 199, we get 2 and a remainder of 191.
Use 2 as the next digit of our solution. 
Result so far: 499452.0
If we subtract 398 from 589, we get 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Going ahead to step 9:
If we divide 1910 by 199, we get 9 and a remainder of 119.
Record the quotient 9 as the next digit in the result. 
Result so far: 499452.9
Subtract 1791 from 1910 to get 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

On to step 10:
When dividing 1190 by 199, we get 5 with a remainder of 195.
Put 5 as the next digit of the answer. 
Result so far: 499452.95
If we take 995 away from 1190, we end up with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

On to step 11:
1950 divided by 199 is 9 with a remainder of 159.
Use 9 as the next digit of our solution. 
Result so far: 499452.959
Subtract 1791 from 1950 to get 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Advancing to step 12:
When dividing 1590 by 199, we get 7 with a remainder of 197.
Write down 7 as next digit of the result. 
Result so far: 499452.9597
If we subtract 1393 from 1590, we get 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

On to step 13:
The number 199 fits into 1970 9 times, leaving a remainder of 179.
Record the quotient 9 as the next digit in the result. 
Result so far: 499452.95979
Deduct 1791 from 1970 and we're left with 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Going ahead to step 14:
When dividing 1790 by 199, we get 8 with a remainder of 198.
The next digit of our result is 8. 
Result so far: 499452.959798
Deduct 1592 from 1790 and we're left with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Going ahead to step 15:
The number 199 fits into 1980 9 times, leaving a remainder of 189.
The number 9 becomes the next digit in our result. 
Result so far: 499452.9597989
Subtracting 1791 from 1980 leaves us with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Moving on to step 16:
If we divide 1890 by 199, we get 9 and a remainder of 99.
Use 9 as the next digit of our solution. 
Result so far: 499452.95979899
If we subtract 1791 from 1890, we get 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Our division results in 499452.95979899 with a remaining 9.9e-08.