Let's divide 990144 by 91
We're looking to find how many times 91 goes into 990144.

Step 1:
The number 91 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 91

Advancing to step 2:
91 goes into 99 1 times with a remainder of 8.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 91 from 99 and we're left with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 91

Moving on to step 3:
80 divided by 91 is 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 10.0
The remainder is 80 after subtracting 0 from 80.
Fetch the next digit (1) from the dividend, attach it to 80 and continue: 801 / 91

Let's proceed to step 4:
91 goes into 801 8 times with a remainder of 73.
Use 8 as the next digit of our solution. 
Result so far: 108.0
The remainder is 73 after subtracting 728 from 801.
Append the next digit (4) from the dividend to 73 and continue with: 734 / 91

On to step 5:
The number 91 fits into 734 8 times, leaving a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 1088.0
Deduct 728 from 734 and we're left with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 91

On to step 6:
When dividing 64 by 91, we get 0 with a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 10880.0
If we subtract 0 from 64, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 7:
91 goes into 640 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 10880.7
Subtract 637 from 640 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 8:
The number 91 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 10880.7
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 9:
When dividing 300 by 91, we get 3 with a remainder of 27.
The next digit of our result is 3. 
Result so far: 10880.703
The remainder is 27 after subtracting 273 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 10:
91 can be fit into 270 2 times, resulting in a remainder of 88.
The number 2 becomes the next digit in our result. 
Result so far: 10880.7032
The remainder is 88 after subtracting 182 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Let's proceed to step 11:
91 can be fit into 880 9 times, resulting in a remainder of 61.
The next digit of our result is 9. 
Result so far: 10880.70329
Subtract 819 from 880 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 12:
The number 91 fits into 610 6 times, leaving a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 10880.703296
Subtract 546 from 610 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 13:
The number 91 fits into 640 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 10880.7032967
Deduct 637 from 640 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 14:
30 divided by 91 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 10880.7032967
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 10880.7032967 with a remainder of 3e-08.