We look at the division of 6647387 by 391 
We're looking to find how many times 391 goes into 6647387.

Moving on to step 1:
6 divided by 391 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 391

Going ahead to step 2:
If we divide 66 by 391, we get 0 and a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Fetch the next digit (4) from the dividend, attach it to 66 and continue: 664 / 391

Advancing to step 3:
When dividing 664 by 391, we get 1 with a remainder of 273.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 273 after subtracting 391 from 664.
Take the next digit (7) from the dividend and append it to 273, then repeat: 2737 / 391

Let's proceed to step 4:
2737 divided by 391 is 7 with a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we subtract 2737 from 2737, we get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 391

Advancing to step 5:
The number 391 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 170.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 391

Let's proceed to step 6:
The number 391 fits into 38 0 times, leaving a remainder of 38.
Record the quotient 0 as the next digit in the result. 
Result so far: 1700.0
Subtracting 0 from 38 leaves us with 38.
Append the next digit (7) from the dividend to 38 and continue with: 387 / 391

Step 7:
387 divided by 391 is 0 with a remainder of 387.
Use 0 as the next digit of our solution. 
Result so far: 17000.0
If we take 0 away from 387, we end up with 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Going ahead to step 8:
If we divide 3870 by 391, we get 9 and a remainder of 351.
Use 9 as the next digit of our solution. 
Result so far: 17000.9
If we take 3519 away from 3870, we end up with 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

Moving on to step 9:
If we divide 3510 by 391, we get 8 and a remainder of 382.
Put 8 as the next digit of the answer. 
Result so far: 17000.98
Deduct 3128 from 3510 and we're left with 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

On to step 10:
The number 391 fits into 3820 9 times, leaving a remainder of 301.
Put 9 as the next digit of the answer. 
Result so far: 17000.989
Subtracting 3519 from 3820 leaves us with 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Step 11:
If we divide 3010 by 391, we get 7 and a remainder of 273.
Use 7 as the next digit of our solution. 
Result so far: 17000.9897
Subtract 2737 from 3010 to get 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

On to step 12:
391 goes into 2730 6 times with a remainder of 384.
Write down 6 as next digit of the result. 
Result so far: 17000.98976
Deduct 2346 from 2730 and we're left with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Let's proceed to step 13:
If we divide 3840 by 391, we get 9 and a remainder of 321.
The next digit of our result is 9. 
Result so far: 17000.989769
Deduct 3519 from 3840 and we're left with 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

Moving on to step 14:
391 can be fit into 3210 8 times, resulting in a remainder of 82.
Write down 8 as next digit of the result. 
Result so far: 17000.9897698
Deduct 3128 from 3210 and we're left with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 15:
391 can be fit into 820 2 times, resulting in a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 17000.98976982
Deduct 782 from 820 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The final outcome is 17000.98976982, with a leftover of 3.8e-08.