We're dividing 515103 by 39 
Our goal is to divide 515103 by 39.

Advancing to step 1:
39 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 39

On to step 2:
39 goes into 51 1 times with a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 39 from 51 leaves us with 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 39

Advancing to step 3:
125 divided by 39 is 3 with a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtracting 117 from 125 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 39

Let's proceed to step 4:
81 divided by 39 is 2 with a remainder of 3.
The next digit of our result is 2. 
Result so far: 132.0
If we take 78 away from 81, we end up with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 39

Let's proceed to step 5:
When dividing 30 by 39, we get 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 1320.0
Subtract 0 from 30 to get 30.
Take the next digit (3) from the dividend and append it to 30, then repeat: 303 / 39

Moving on to step 6:
303 divided by 39 is 7 with a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 13207.0
If we take 273 away from 303, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 7:
When dividing 300 by 39, we get 7 with a remainder of 27.
The number 7 becomes the next digit in our result. 
Result so far: 13207.7
The remainder is 27 after subtracting 273 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 8:
39 can be fit into 270 6 times, resulting in a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 13207.76
Deduct 234 from 270 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 9:
If we divide 360 by 39, we get 9 and a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 13207.769
The remainder is 9 after subtracting 351 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 10:
The number 39 fits into 90 2 times, leaving a remainder of 12.
The next digit of our result is 2. 
Result so far: 13207.7692
Subtracting 78 from 90 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 11:
39 can be fit into 120 3 times, resulting in a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 13207.76923
If we take 117 away from 120, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 12:
When dividing 30 by 39, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 13207.76923
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 13:
When dividing 300 by 39, we get 7 with a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 13207.7692307
Deduct 273 from 300 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 14:
270 divided by 39 is 6 with a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 13207.76923076
If we take 234 away from 270, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final outcome is 13207.76923076, with a leftover of 3.6e-08.