We look at the division of 86542368 by 991 
We want to divide 86542368 by 991.

Going ahead to step 1:
If we divide 8 by 991, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 991

Moving on to step 2:
The number 991 fits into 86 0 times, leaving a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Take the next digit (5) from the dividend and append it to 86, then repeat: 865 / 991

Step 3:
865 divided by 991 is 0 with a remainder of 865.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 865 leaves us with 865.
Take the next digit (4) from the dividend and append it to 865, then repeat: 8654 / 991

Let's proceed to step 4:
991 goes into 8654 8 times with a remainder of 726.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 7928 from 8654, we get 726.
Take the next digit (2) from the dividend and append it to 726, then repeat: 7262 / 991

Step 5:
991 can be fit into 7262 7 times, resulting in a remainder of 325.
The number 7 becomes the next digit in our result. 
Result so far: 87.0
Subtract 6937 from 7262 to get 325.
Include the next digit (3) from the dividend after 325, then repeat: 3253 / 991

Going ahead to step 6:
The number 991 fits into 3253 3 times, leaving a remainder of 280.
Record the quotient 3 as the next digit in the result. 
Result so far: 873.0
If we subtract 2973 from 3253, we get 280.
Append the next digit (6) from the dividend to 280 and continue with: 2806 / 991

Moving on to step 7:
If we divide 2806 by 991, we get 2 and a remainder of 824.
Write down 2 as next digit of the result. 
Result so far: 8732.0
If we subtract 1982 from 2806, we get 824.
Fetch the next digit (8) from the dividend, attach it to 824 and continue: 8248 / 991

Moving on to step 8:
When dividing 8248 by 991, we get 8 with a remainder of 320.
Write down 8 as next digit of the result. 
Result so far: 87328.0
Subtracting 7928 from 8248 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 9:
991 goes into 3200 3 times with a remainder of 227.
The number 3 becomes the next digit in our result. 
Result so far: 87328.3
Subtracting 2973 from 3200 leaves us with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Step 10:
The number 991 fits into 2270 2 times, leaving a remainder of 288.
Record the quotient 2 as the next digit in the result. 
Result so far: 87328.32
Subtracting 1982 from 2270 leaves us with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Step 11:
If we divide 2880 by 991, we get 2 and a remainder of 898.
Record the quotient 2 as the next digit in the result. 
Result so far: 87328.322
Deduct 1982 from 2880 and we're left with 898.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8980, and continue the process.

The quotient of the division is 87328.322, and the remainder is 0.0898.