86447575 divided by 991 
We want to figure out the number of times 86447575 can be divided by 991.

On to step 1:
When dividing 8 by 991, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 991

Let's proceed to step 2:
991 can be fit into 86 0 times, resulting in a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Take the next digit (4) from the dividend and append it to 86, then repeat: 864 / 991

Step 3:
864 divided by 991 is 0 with a remainder of 864.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 864 leaves us with 864.
Append the next digit (4) from the dividend to 864 and continue with: 8644 / 991

Step 4:
If we divide 8644 by 991, we get 8 and a remainder of 716.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 7928 from 8644 leaves us with 716.
Bring next digit (7) of the dividend behind the 716 and repeat the process: 7167 / 991

Step 5:
991 goes into 7167 7 times with a remainder of 230.
The next digit of our result is 7. 
Result so far: 87.0
The remainder is 230 after subtracting 6937 from 7167.
Bring next digit (5) of the dividend behind the 230 and repeat the process: 2305 / 991

Let's proceed to step 6:
The number 991 fits into 2305 2 times, leaving a remainder of 323.
The number 2 becomes the next digit in our result. 
Result so far: 872.0
Subtract 1982 from 2305 to get 323.
Append the next digit (7) from the dividend to 323 and continue with: 3237 / 991

On to step 7:
When dividing 3237 by 991, we get 3 with a remainder of 264.
Record the quotient 3 as the next digit in the result. 
Result so far: 8723.0
If we take 2973 away from 3237, we end up with 264.
Bring next digit (5) of the dividend behind the 264 and repeat the process: 2645 / 991

Going ahead to step 8:
991 can be fit into 2645 2 times, resulting in a remainder of 663.
Put 2 as the next digit of the answer. 
Result so far: 87232.0
If we subtract 1982 from 2645, we get 663.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6630, and continue the process.

On to step 9:
6630 divided by 991 is 6 with a remainder of 684.
Put 6 as the next digit of the answer. 
Result so far: 87232.6
If we subtract 5946 from 6630, we get 684.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

Let's proceed to step 10:
The number 991 fits into 6840 6 times, leaving a remainder of 894.
Write down 6 as next digit of the result. 
Result so far: 87232.66
Deduct 5946 from 6840 and we're left with 894.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8940, and continue the process.

The final outcome is 87232.66, with a leftover of 0.894.