856303 divided by 13 
Let's see how many times 13 fits into 856303.

Going ahead to step 1:
If we divide 8 by 13, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 13

Advancing to step 2:
13 can be fit into 85 6 times, resulting in a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 78 from 85 leaves us with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 13

Moving on to step 3:
The number 13 fits into 76 5 times, leaving a remainder of 11.
The next digit of our result is 5. 
Result so far: 65.0
Subtracting 65 from 76 leaves us with 11.
Take the next digit (3) from the dividend and append it to 11, then repeat: 113 / 13

Advancing to step 4:
The number 13 fits into 113 8 times, leaving a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 658.0
Subtracting 104 from 113 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 13

Moving on to step 5:
13 can be fit into 90 6 times, resulting in a remainder of 12.
The next digit of our result is 6. 
Result so far: 6586.0
Subtract 78 from 90 to get 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 13

On to step 6:
The number 13 fits into 123 9 times, leaving a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 65869.0
The remainder is 6 after subtracting 117 from 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
If we divide 60 by 13, we get 4 and a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 65869.4
Subtracting 52 from 60 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 8:
13 can be fit into 80 6 times, resulting in a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 65869.46
Subtract 78 from 80 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
13 can be fit into 20 1 times, resulting in a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 65869.461
If we subtract 13 from 20, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 10:
If we divide 70 by 13, we get 5 and a remainder of 5.
The next digit of our result is 5. 
Result so far: 65869.4615
If we subtract 65 from 70, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 11:
When dividing 50 by 13, we get 3 with a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 65869.46153
If we subtract 39 from 50, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 12:
When dividing 110 by 13, we get 8 with a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 65869.461538
If we subtract 104 from 110, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
If we divide 60 by 13, we get 4 and a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 65869.4615384
If we subtract 52 from 60, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 14:
80 divided by 13 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 65869.46153846
Deduct 78 from 80 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 65869.46153846, with a leftover of 2e-09.