We look at the division of 91011587 by 18 
We want to figure out the number of times 91011587 can be divided by 18.

Moving on to step 1:
18 can be fit into 9 0 times, resulting in a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 18

Advancing to step 2:
If we divide 91 by 18, we get 5 and a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Deduct 90 from 91 and we're left with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 18

Advancing to step 3:
10 divided by 18 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 50.0
Subtracting 0 from 10 leaves us with 10.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 18

Let's proceed to step 4:
If we divide 101 by 18, we get 5 and a remainder of 11.
The next digit of our result is 5. 
Result so far: 505.0
If we subtract 90 from 101, we get 11.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 18

Step 5:
If we divide 111 by 18, we get 6 and a remainder of 3.
The next digit of our result is 6. 
Result so far: 5056.0
Subtract 108 from 111 to get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 18

Going ahead to step 6:
18 can be fit into 35 1 times, resulting in a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 50561.0
If we subtract 18 from 35, we get 17.
Append the next digit (8) from the dividend to 17 and continue with: 178 / 18

Let's proceed to step 7:
The number 18 fits into 178 9 times, leaving a remainder of 16.
Use 9 as the next digit of our solution. 
Result so far: 505619.0
If we take 162 away from 178, we end up with 16.
Grab the next digit (7) from the dividend, add it to 16, then carry on: 167 / 18

On to step 8:
When dividing 167 by 18, we get 9 with a remainder of 5.
Write down 9 as next digit of the result. 
Result so far: 5056199.0
If we subtract 162 from 167, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
The number 18 fits into 50 2 times, leaving a remainder of 14.
The next digit of our result is 2. 
Result so far: 5056199.2
The remainder is 14 after subtracting 36 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 10:
18 goes into 140 7 times with a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 5056199.27
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 11:
140 divided by 18 is 7 with a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 5056199.277
If we subtract 126 from 140, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 5056199.277 with a balance of 0.0014.