64596516 divided by 991 
We want to figure out the number of times 64596516 can be divided by 991.

Step 1:
6 divided by 991 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 991

On to step 2:
991 goes into 64 0 times with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Bring next digit (5) of the dividend behind the 64 and repeat the process: 645 / 991

Going ahead to step 3:
991 can be fit into 645 0 times, resulting in a remainder of 645.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 645 and we're left with 645.
Bring next digit (9) of the dividend behind the 645 and repeat the process: 6459 / 991

Moving on to step 4:
6459 divided by 991 is 6 with a remainder of 513.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 5946 from 6459 to get 513.
Append the next digit (6) from the dividend to 513 and continue with: 5136 / 991

Let's proceed to step 5:
991 goes into 5136 5 times with a remainder of 181.
Record the quotient 5 as the next digit in the result. 
Result so far: 65.0
The remainder is 181 after subtracting 4955 from 5136.
Fetch the next digit (5) from the dividend, attach it to 181 and continue: 1815 / 991

On to step 6:
If we divide 1815 by 991, we get 1 and a remainder of 824.
Record the quotient 1 as the next digit in the result. 
Result so far: 651.0
Subtract 991 from 1815 to get 824.
Fetch the next digit (1) from the dividend, attach it to 824 and continue: 8241 / 991

Moving on to step 7:
If we divide 8241 by 991, we get 8 and a remainder of 313.
The next digit of our result is 8. 
Result so far: 6518.0
Subtracting 7928 from 8241 leaves us with 313.
Fetch the next digit (6) from the dividend, attach it to 313 and continue: 3136 / 991

Advancing to step 8:
The number 991 fits into 3136 3 times, leaving a remainder of 163.
The number 3 becomes the next digit in our result. 
Result so far: 65183.0
Subtracting 2973 from 3136 leaves us with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

On to step 9:
The number 991 fits into 1630 1 times, leaving a remainder of 639.
Write down 1 as next digit of the result. 
Result so far: 65183.1
The remainder is 639 after subtracting 991 from 1630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6390, and continue the process.

Moving on to step 10:
6390 divided by 991 is 6 with a remainder of 444.
Put 6 as the next digit of the answer. 
Result so far: 65183.16
If we subtract 5946 from 6390, we get 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Step 11:
991 can be fit into 4440 4 times, resulting in a remainder of 476.
Record the quotient 4 as the next digit in the result. 
Result so far: 65183.164
Subtracting 3964 from 4440 leaves us with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

On to step 12:
If we divide 4760 by 991, we get 4 and a remainder of 796.
Use 4 as the next digit of our solution. 
Result so far: 65183.1644
The remainder is 796 after subtracting 3964 from 4760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7960, and continue the process.

The final outcome is 65183.1644, with a leftover of 0.00796.