Let's divide 17978839 by 221
We want to figure out the number of times 17978839 can be divided by 221.

Advancing to step 1:
1 divided by 221 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 221

On to step 2:
The number 221 fits into 17 0 times, leaving a remainder of 17.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 17 leaves us with 17.
Take the next digit (9) from the dividend and append it to 17, then repeat: 179 / 221

On to step 3:
The number 221 fits into 179 0 times, leaving a remainder of 179.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 179, we end up with 179.
Bring next digit (7) of the dividend behind the 179 and repeat the process: 1797 / 221

Going ahead to step 4:
221 goes into 1797 8 times with a remainder of 29.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 1768 from 1797 to get 29.
Grab the next digit (8) from the dividend, add it to 29, then carry on: 298 / 221

Moving on to step 5:
221 can be fit into 298 1 times, resulting in a remainder of 77.
Put 1 as the next digit of the answer. 
Result so far: 81.0
If we take 221 away from 298, we end up with 77.
Append the next digit (8) from the dividend to 77 and continue with: 778 / 221

Step 6:
The number 221 fits into 778 3 times, leaving a remainder of 115.
Write down 3 as next digit of the result. 
Result so far: 813.0
The remainder is 115 after subtracting 663 from 778.
Append the next digit (3) from the dividend to 115 and continue with: 1153 / 221

Step 7:
If we divide 1153 by 221, we get 5 and a remainder of 48.
The next digit of our result is 5. 
Result so far: 8135.0
Subtract 1105 from 1153 to get 48.
Include the next digit (9) from the dividend after 48, then repeat: 489 / 221

Moving on to step 8:
221 can be fit into 489 2 times, resulting in a remainder of 47.
Use 2 as the next digit of our solution. 
Result so far: 81352.0
Subtract 442 from 489 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 9:
If we divide 470 by 221, we get 2 and a remainder of 28.
The next digit of our result is 2. 
Result so far: 81352.2
If we take 442 away from 470, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 10:
The number 221 fits into 280 1 times, leaving a remainder of 59.
The number 1 becomes the next digit in our result. 
Result so far: 81352.21
The remainder is 59 after subtracting 221 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 11:
221 can be fit into 590 2 times, resulting in a remainder of 148.
Put 2 as the next digit of the answer. 
Result so far: 81352.212
Deduct 442 from 590 and we're left with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 12:
221 goes into 1480 6 times with a remainder of 154.
The next digit of our result is 6. 
Result so far: 81352.2126
Deduct 1326 from 1480 and we're left with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Going ahead to step 13:
221 can be fit into 1540 6 times, resulting in a remainder of 214.
The next digit of our result is 6. 
Result so far: 81352.21266
Deduct 1326 from 1540 and we're left with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Our division results in 81352.21266 with a remaining 0.000214.