13865644 ÷ 13 
Our goal is to divide 13865644 by 13.

On to step 1:
13 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 13

Going ahead to step 2:
13 can be fit into 13 1 times, resulting in a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 13 from 13 to get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 13

Going ahead to step 3:
When dividing 8 by 13, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 8 to get 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 13

Advancing to step 4:
When dividing 86 by 13, we get 6 with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 106.0
The remainder is 8 after subtracting 78 from 86.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 13

Step 5:
85 divided by 13 is 6 with a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 1066.0
If we subtract 78 from 85, we get 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 13

Let's proceed to step 6:
The number 13 fits into 76 5 times, leaving a remainder of 11.
The next digit of our result is 5. 
Result so far: 10665.0
Deduct 65 from 76 and we're left with 11.
Take the next digit (4) from the dividend and append it to 11, then repeat: 114 / 13

Moving on to step 7:
When dividing 114 by 13, we get 8 with a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 106658.0
Subtracting 104 from 114 leaves us with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 13

Let's proceed to step 8:
13 goes into 104 8 times with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 1066588.0
If we subtract 104 from 104, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
13 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1066588.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
13 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1066588.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 1066588.0 with a remainder of 0.0.