We look at the division of 28439961 by 13 
Our goal is to divide 28439961 by 13.

On to step 1:
When dividing 2 by 13, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 13

On to step 2:
28 divided by 13 is 2 with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 26 from 28 leaves us with 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 13

Advancing to step 3:
When dividing 24 by 13, we get 1 with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we subtract 13 from 24, we get 11.
Include the next digit (3) from the dividend after 11, then repeat: 113 / 13

Step 4:
The number 13 fits into 113 8 times, leaving a remainder of 9.
Write down 8 as next digit of the result. 
Result so far: 218.0
If we take 104 away from 113, we end up with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 13

Advancing to step 5:
When dividing 99 by 13, we get 7 with a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 2187.0
The remainder is 8 after subtracting 91 from 99.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 13

On to step 6:
89 divided by 13 is 6 with a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 21876.0
If we take 78 away from 89, we end up with 11.
Append the next digit (6) from the dividend to 11 and continue with: 116 / 13

Moving on to step 7:
13 can be fit into 116 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 218768.0
If we subtract 104 from 116, we get 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 13

Step 8:
13 goes into 121 9 times with a remainder of 4.
Record the quotient 9 as the next digit in the result. 
Result so far: 2187689.0
The remainder is 4 after subtracting 117 from 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
When dividing 40 by 13, we get 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 2187689.3
Subtracting 39 from 40 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 10:
The number 13 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 2187689.3
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
100 divided by 13 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 2187689.307
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 12:
The number 13 fits into 90 6 times, leaving a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 2187689.3076
Subtract 78 from 90 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 13:
13 can be fit into 120 9 times, resulting in a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 2187689.30769
The remainder is 3 after subtracting 117 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 14:
When dividing 30 by 13, we get 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 2187689.307692
If we take 26 away from 30, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 15:
The number 13 fits into 40 3 times, leaving a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 2187689.3076923
Subtract 39 from 40 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 16:
The number 13 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 2187689.3076923
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 2187689.3076923 with a remaining 1e-08.