17904136 ÷ 221 
We're looking to find how many times 221 goes into 17904136.

Going ahead to step 1:
The number 221 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 221

On to step 2:
When dividing 17 by 221, we get 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 17, we end up with 17.
Take the next digit (9) from the dividend and append it to 17, then repeat: 179 / 221

Going ahead to step 3:
If we divide 179 by 221, we get 0 and a remainder of 179.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 179 to get 179.
Include the next digit (0) from the dividend after 179, then repeat: 1790 / 221

Going ahead to step 4:
If we divide 1790 by 221, we get 8 and a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 1768 from 1790 and we're left with 22.
Bring next digit (4) of the dividend behind the 22 and repeat the process: 224 / 221

Advancing to step 5:
The number 221 fits into 224 1 times, leaving a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 81.0
If we subtract 221 from 224, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 221

Let's proceed to step 6:
If we divide 31 by 221, we get 0 and a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 810.0
Deduct 0 from 31 and we're left with 31.
Bring next digit (3) of the dividend behind the 31 and repeat the process: 313 / 221

Advancing to step 7:
221 goes into 313 1 times with a remainder of 92.
Put 1 as the next digit of the answer. 
Result so far: 8101.0
The remainder is 92 after subtracting 221 from 313.
Bring next digit (6) of the dividend behind the 92 and repeat the process: 926 / 221

Advancing to step 8:
926 divided by 221 is 4 with a remainder of 42.
Record the quotient 4 as the next digit in the result. 
Result so far: 81014.0
If we take 884 away from 926, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 9:
If we divide 420 by 221, we get 1 and a remainder of 199.
The next digit of our result is 1. 
Result so far: 81014.1
Deduct 221 from 420 and we're left with 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

Step 10:
When dividing 1990 by 221, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 81014.19
The remainder is 1 after subtracting 1989 from 1990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 11:
When dividing 10 by 221, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 81014.19
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 12:
100 divided by 221 is 0 with a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 81014.19
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Our division results in 81014.19 with a remaining 0.001.