91931288 divided by 221 
We want to figure out the number of times 91931288 can be divided by 221.

Let's proceed to step 1:
If we divide 9 by 221, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 221

Advancing to step 2:
221 goes into 91 0 times with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Bring next digit (9) of the dividend behind the 91 and repeat the process: 919 / 221

Going ahead to step 3:
The number 221 fits into 919 4 times, leaving a remainder of 35.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 35 after subtracting 884 from 919.
Grab the next digit (3) from the dividend, add it to 35, then carry on: 353 / 221

On to step 4:
221 can be fit into 353 1 times, resulting in a remainder of 132.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
If we take 221 away from 353, we end up with 132.
Append the next digit (1) from the dividend to 132 and continue with: 1321 / 221

Going ahead to step 5:
When dividing 1321 by 221, we get 5 with a remainder of 216.
Record the quotient 5 as the next digit in the result. 
Result so far: 415.0
The remainder is 216 after subtracting 1105 from 1321.
Fetch the next digit (2) from the dividend, attach it to 216 and continue: 2162 / 221

Moving on to step 6:
2162 divided by 221 is 9 with a remainder of 173.
Write down 9 as next digit of the result. 
Result so far: 4159.0
If we take 1989 away from 2162, we end up with 173.
Grab the next digit (8) from the dividend, add it to 173, then carry on: 1738 / 221

Step 7:
221 goes into 1738 7 times with a remainder of 191.
Write down 7 as next digit of the result. 
Result so far: 41597.0
If we subtract 1547 from 1738, we get 191.
Append the next digit (8) from the dividend to 191 and continue with: 1918 / 221

Moving on to step 8:
221 goes into 1918 8 times with a remainder of 150.
The number 8 becomes the next digit in our result. 
Result so far: 415978.0
The remainder is 150 after subtracting 1768 from 1918.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 9:
The number 221 fits into 1500 6 times, leaving a remainder of 174.
Use 6 as the next digit of our solution. 
Result so far: 415978.6
The remainder is 174 after subtracting 1326 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

On to step 10:
221 goes into 1740 7 times with a remainder of 193.
Record the quotient 7 as the next digit in the result. 
Result so far: 415978.67
If we take 1547 away from 1740, we end up with 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Moving on to step 11:
221 goes into 1930 8 times with a remainder of 162.
The number 8 becomes the next digit in our result. 
Result so far: 415978.678
If we take 1768 away from 1930, we end up with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Step 12:
When dividing 1620 by 221, we get 7 with a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 415978.6787
Deduct 1547 from 1620 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 13:
221 goes into 730 3 times with a remainder of 67.
Record the quotient 3 as the next digit in the result. 
Result so far: 415978.67873
The remainder is 67 after subtracting 663 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 14:
When dividing 670 by 221, we get 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 415978.678733
Deduct 663 from 670 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 415978.678733 and a remainder of 7e-07.