We're dividing 90406512 by 991 
We're looking to find how many times 991 goes into 90406512.

Going ahead to step 1:
9 divided by 991 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 991

Advancing to step 2:
991 goes into 90 0 times with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Take the next digit (4) from the dividend and append it to 90, then repeat: 904 / 991

Moving on to step 3:
904 divided by 991 is 0 with a remainder of 904.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 904 and we're left with 904.
Bring next digit (0) of the dividend behind the 904 and repeat the process: 9040 / 991

Moving on to step 4:
991 goes into 9040 9 times with a remainder of 121.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 8919 from 9040 and we're left with 121.
Take the next digit (6) from the dividend and append it to 121, then repeat: 1216 / 991

Step 5:
991 goes into 1216 1 times with a remainder of 225.
Record the quotient 1 as the next digit in the result. 
Result so far: 91.0
If we take 991 away from 1216, we end up with 225.
Grab the next digit (5) from the dividend, add it to 225, then carry on: 2255 / 991

On to step 6:
When dividing 2255 by 991, we get 2 with a remainder of 273.
The number 2 becomes the next digit in our result. 
Result so far: 912.0
Subtracting 1982 from 2255 leaves us with 273.
Fetch the next digit (1) from the dividend, attach it to 273 and continue: 2731 / 991

Step 7:
991 can be fit into 2731 2 times, resulting in a remainder of 749.
Use 2 as the next digit of our solution. 
Result so far: 9122.0
Subtract 1982 from 2731 to get 749.
Include the next digit (2) from the dividend after 749, then repeat: 7492 / 991

Moving on to step 8:
The number 991 fits into 7492 7 times, leaving a remainder of 555.
The next digit of our result is 7. 
Result so far: 91227.0
The remainder is 555 after subtracting 6937 from 7492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

Advancing to step 9:
991 can be fit into 5550 5 times, resulting in a remainder of 595.
The number 5 becomes the next digit in our result. 
Result so far: 91227.5
If we take 4955 away from 5550, we end up with 595.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

Moving on to step 10:
5950 divided by 991 is 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 91227.56
Deduct 5946 from 5950 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 11:
991 goes into 40 0 times with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 91227.56
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 12:
991 can be fit into 400 0 times, resulting in a remainder of 400.
The next digit of our result is 0. 
Result so far: 91227.56
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Our division results in 91227.56 with a remaining 0.004.