We look at the division of 103815 by 80 
Our goal is to divide 103815 by 80.

Step 1:
If we divide 1 by 80, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 80

Advancing to step 2:
If we divide 10 by 80, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 10 and we're left with 10.
Include the next digit (3) from the dividend after 10, then repeat: 103 / 80

Going ahead to step 3:
80 goes into 103 1 times with a remainder of 23.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 80 from 103, we get 23.
Append the next digit (8) from the dividend to 23 and continue with: 238 / 80

Going ahead to step 4:
238 divided by 80 is 2 with a remainder of 78.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtract 160 from 238 to get 78.
Include the next digit (1) from the dividend after 78, then repeat: 781 / 80

On to step 5:
The number 80 fits into 781 9 times, leaving a remainder of 61.
Put 9 as the next digit of the answer. 
Result so far: 129.0
Subtracting 720 from 781 leaves us with 61.
Bring next digit (5) of the dividend behind the 61 and repeat the process: 615 / 80

Step 6:
80 can be fit into 615 7 times, resulting in a remainder of 55.
The number 7 becomes the next digit in our result. 
Result so far: 1297.0
The remainder is 55 after subtracting 560 from 615.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 7:
550 divided by 80 is 6 with a remainder of 70.
Record the quotient 6 as the next digit in the result. 
Result so far: 1297.6
If we take 480 away from 550, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
80 goes into 700 8 times with a remainder of 60.
The number 8 becomes the next digit in our result. 
Result so far: 1297.68
If we subtract 640 from 700, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
When dividing 600 by 80, we get 7 with a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 1297.687
Deduct 560 from 600 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
When dividing 400 by 80, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 1297.6875
The remainder is 0 after subtracting 400 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1297.6875
If we take 0 away from 0, we end up 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 12:
80 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1297.6875
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 quotient of the division is 1297.6875, and the remainder is 0.0.