39953195 ÷ 991 
We want to divide 39953195 by 991.

Going ahead to step 1:
3 divided by 991 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 991

Advancing to step 2:
When dividing 39 by 991, we get 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Bring next digit (9) of the dividend behind the 39 and repeat the process: 399 / 991

On to step 3:
The number 991 fits into 399 0 times, leaving a remainder of 399.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 399 leaves us with 399.
Bring next digit (5) of the dividend behind the 399 and repeat the process: 3995 / 991

Moving on to step 4:
3995 divided by 991 is 4 with a remainder of 31.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 31 after subtracting 3964 from 3995.
Bring next digit (3) of the dividend behind the 31 and repeat the process: 313 / 991

Let's proceed to step 5:
If we divide 313 by 991, we get 0 and a remainder of 313.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Subtract 0 from 313 to get 313.
Bring next digit (1) of the dividend behind the 313 and repeat the process: 3131 / 991

Going ahead to step 6:
The number 991 fits into 3131 3 times, leaving a remainder of 158.
Put 3 as the next digit of the answer. 
Result so far: 403.0
Subtracting 2973 from 3131 leaves us with 158.
Bring next digit (9) of the dividend behind the 158 and repeat the process: 1589 / 991

Let's proceed to step 7:
991 goes into 1589 1 times with a remainder of 598.
The next digit of our result is 1. 
Result so far: 4031.0
Subtracting 991 from 1589 leaves us with 598.
Append the next digit (5) from the dividend to 598 and continue with: 5985 / 991

Let's proceed to step 8:
991 can be fit into 5985 6 times, resulting in a remainder of 39.
Put 6 as the next digit of the answer. 
Result so far: 40316.0
If we subtract 5946 from 5985, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 9:
991 goes into 390 0 times with a remainder of 390.
Put 0 as the next digit of the answer. 
Result so far: 40316.0
Subtracting 0 from 390 leaves us with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

On to step 10:
When dividing 3900 by 991, we get 3 with a remainder of 927.
Put 3 as the next digit of the answer. 
Result so far: 40316.03
Subtract 2973 from 3900 to get 927.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9270, and continue the process.

Let's proceed to step 11:
If we divide 9270 by 991, we get 9 and a remainder of 351.
The number 9 becomes the next digit in our result. 
Result so far: 40316.039
The remainder is 351 after subtracting 8919 from 9270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

Advancing to step 12:
When dividing 3510 by 991, we get 3 with a remainder of 537.
The next digit of our result is 3. 
Result so far: 40316.0393
Deduct 2973 from 3510 and we're left with 537.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5370, and continue the process.

Advancing to step 13:
The number 991 fits into 5370 5 times, leaving a remainder of 415.
Write down 5 as next digit of the result. 
Result so far: 40316.03935
The remainder is 415 after subtracting 4955 from 5370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Let's proceed to step 14:
4150 divided by 991 is 4 with a remainder of 186.
The next digit of our result is 4. 
Result so far: 40316.039354
Subtract 3964 from 4150 to get 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Moving on to step 15:
1860 divided by 991 is 1 with a remainder of 869.
Put 1 as the next digit of the answer. 
Result so far: 40316.0393541
If we take 991 away from 1860, we end up with 869.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8690, and continue the process.

On to step 16:
The number 991 fits into 8690 8 times, leaving a remainder of 762.
Put 8 as the next digit of the answer. 
Result so far: 40316.03935418
The remainder is 762 after subtracting 7928 from 8690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7620, and continue the process.

The final result is 40316.03935418 with a remainder of 7.62e-07.