Let's divide 138103 by 12
We want to divide 138103 by 12.

Going ahead to step 1:
12 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 12

On to step 2:
When dividing 13 by 12, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 1 after subtracting 12 from 13.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 12

Advancing to step 3:
18 divided by 12 is 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we subtract 12 from 18, we get 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 12

On to step 4:
61 divided by 12 is 5 with a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 115.0
Subtract 60 from 61 to get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 12

Let's proceed to step 5:
If we divide 10 by 12, we get 0 and a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 1150.0
Deduct 0 from 10 and we're left with 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 12

Step 6:
When dividing 103 by 12, we get 8 with a remainder of 7.
Use 8 as the next digit of our solution. 
Result so far: 11508.0
Subtract 96 from 103 to 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.

On to step 7:
12 goes into 70 5 times with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 11508.5
If we subtract 60 from 70, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
12 can be fit into 100 8 times, resulting in a remainder of 4.
The next digit of our result is 8. 
Result so far: 11508.58
If we subtract 96 from 100, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 9:
12 can be fit into 40 3 times, resulting in a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 11508.583
The remainder is 4 after subtracting 36 from 40.
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 10:
The number 12 fits into 40 3 times, leaving a remainder of 4.
The next digit of our result is 3. 
Result so far: 11508.5833
Deduct 36 from 40 and we're left 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.

The quotient of the division is 11508.5833, and the remainder is 4e-05.