13007239 divided by 857 
We want to figure out the number of times 13007239 can be divided by 857.

On to step 1:
When dividing 1 by 857, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 857

Going ahead to step 2:
13 divided by 857 is 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Fetch the next digit (0) from the dividend, attach it to 13 and continue: 130 / 857

Advancing to step 3:
The number 857 fits into 130 0 times, leaving a remainder of 130.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 130 and we're left with 130.
Fetch the next digit (0) from the dividend, attach it to 130 and continue: 1300 / 857

Step 4:
857 goes into 1300 1 times with a remainder of 443.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 857 from 1300 and we're left with 443.
Append the next digit (7) from the dividend to 443 and continue with: 4437 / 857

Going ahead to step 5:
If we divide 4437 by 857, we get 5 and a remainder of 152.
The next digit of our result is 5. 
Result so far: 15.0
If we subtract 4285 from 4437, we get 152.
Bring next digit (2) of the dividend behind the 152 and repeat the process: 1522 / 857

On to step 6:
If we divide 1522 by 857, we get 1 and a remainder of 665.
Write down 1 as next digit of the result. 
Result so far: 151.0
The remainder is 665 after subtracting 857 from 1522.
Bring next digit (3) of the dividend behind the 665 and repeat the process: 6653 / 857

Moving on to step 7:
857 goes into 6653 7 times with a remainder of 654.
Record the quotient 7 as the next digit in the result. 
Result so far: 1517.0
Subtract 5999 from 6653 to get 654.
Bring next digit (9) of the dividend behind the 654 and repeat the process: 6549 / 857

Moving on to step 8:
857 goes into 6549 7 times with a remainder of 550.
The next digit of our result is 7. 
Result so far: 15177.0
The remainder is 550 after subtracting 5999 from 6549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

On to step 9:
If we divide 5500 by 857, we get 6 and a remainder of 358.
The number 6 becomes the next digit in our result. 
Result so far: 15177.6
If we take 5142 away from 5500, we end up with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Moving on to step 10:
857 goes into 3580 4 times with a remainder of 152.
Put 4 as the next digit of the answer. 
Result so far: 15177.64
Subtracting 3428 from 3580 leaves us with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Moving on to step 11:
The number 857 fits into 1520 1 times, leaving a remainder of 663.
The number 1 becomes the next digit in our result. 
Result so far: 15177.641
Subtracting 857 from 1520 leaves us with 663.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6630, and continue the process.

Advancing to step 12:
When dividing 6630 by 857, we get 7 with a remainder of 631.
Use 7 as the next digit of our solution. 
Result so far: 15177.6417
Subtracting 5999 from 6630 leaves us with 631.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6310, and continue the process.

Going ahead to step 13:
When dividing 6310 by 857, we get 7 with a remainder of 311.
The number 7 becomes the next digit in our result. 
Result so far: 15177.64177
The remainder is 311 after subtracting 5999 from 6310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

After the division, we end up with 15177.64177 and a remainder of 0.000311.