Let's divide 28130729 by 391
We're looking to find how many times 391 goes into 28130729.

On to step 1:
391 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 391

Moving on to step 2:
28 divided by 391 is 0 with a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 28 leaves us with 28.
Append the next digit (1) from the dividend to 28 and continue with: 281 / 391

Step 3:
The number 391 fits into 281 0 times, leaving a remainder of 281.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 281 and we're left with 281.
Bring next digit (3) of the dividend behind the 281 and repeat the process: 2813 / 391

Let's proceed to step 4:
If we divide 2813 by 391, we get 7 and a remainder of 76.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 2737 from 2813 leaves us with 76.
Fetch the next digit (0) from the dividend, attach it to 76 and continue: 760 / 391

Going ahead to step 5:
The number 391 fits into 760 1 times, leaving a remainder of 369.
Record the quotient 1 as the next digit in the result. 
Result so far: 71.0
Subtracting 391 from 760 leaves us with 369.
Include the next digit (7) from the dividend after 369, then repeat: 3697 / 391

Step 6:
3697 divided by 391 is 9 with a remainder of 178.
Use 9 as the next digit of our solution. 
Result so far: 719.0
The remainder is 178 after subtracting 3519 from 3697.
Include the next digit (2) from the dividend after 178, then repeat: 1782 / 391

Advancing to step 7:
When dividing 1782 by 391, we get 4 with a remainder of 218.
Use 4 as the next digit of our solution. 
Result so far: 7194.0
The remainder is 218 after subtracting 1564 from 1782.
Take the next digit (9) from the dividend and append it to 218, then repeat: 2189 / 391

Advancing to step 8:
391 can be fit into 2189 5 times, resulting in a remainder of 234.
Record the quotient 5 as the next digit in the result. 
Result so far: 71945.0
If we subtract 1955 from 2189, we get 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Step 9:
2340 divided by 391 is 5 with a remainder of 385.
Put 5 as the next digit of the answer. 
Result so far: 71945.5
Deduct 1955 from 2340 and we're left with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Moving on to step 10:
When dividing 3850 by 391, we get 9 with a remainder of 331.
The number 9 becomes the next digit in our result. 
Result so far: 71945.59
The remainder is 331 after subtracting 3519 from 3850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Let's proceed to step 11:
391 can be fit into 3310 8 times, resulting in a remainder of 182.
The next digit of our result is 8. 
Result so far: 71945.598
If we subtract 3128 from 3310, we get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Going ahead to step 12:
391 goes into 1820 4 times with a remainder of 256.
The number 4 becomes the next digit in our result. 
Result so far: 71945.5984
Subtracting 1564 from 1820 leaves us with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Advancing to step 13:
2560 divided by 391 is 6 with a remainder of 214.
The next digit of our result is 6. 
Result so far: 71945.59846
Subtracting 2346 from 2560 leaves us 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.

Going ahead to step 14:
391 goes into 2140 5 times with a remainder of 185.
Put 5 as the next digit of the answer. 
Result so far: 71945.598465
Subtract 1955 from 2140 to get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Advancing to step 15:
When dividing 1850 by 391, we get 4 with a remainder of 286.
Use 4 as the next digit of our solution. 
Result so far: 71945.5984654
Subtracting 1564 from 1850 leaves us with 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Let's proceed to step 16:
391 goes into 2860 7 times with a remainder of 123.
The next digit of our result is 7. 
Result so far: 71945.59846547
Subtracting 2737 from 2860 leaves us with 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

In conclusion, the division gives 71945.59846547 with a balance of 1.23e-07.