We look at the division of 73403 by 12 
Our goal is to divide 73403 by 12.

On to step 1:
The number 12 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 12

Step 2:
If we divide 73 by 12, we get 6 and a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 72 away from 73, we end up with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 12

Going ahead to step 3:
The number 12 fits into 14 1 times, leaving a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 61.0
If we subtract 12 from 14, we get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 12

On to step 4:
12 goes into 20 1 times with a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 611.0
If we take 12 away from 20, we end up with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 12

Moving on to step 5:
12 goes into 83 6 times with a remainder of 11.
Write down 6 as next digit of the result. 
Result so far: 6116.0
Deduct 72 from 83 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 6:
The number 12 fits into 110 9 times, leaving a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 6116.9
Subtracting 108 from 110 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
When dividing 20 by 12, we get 1 with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 6116.91
If we subtract 12 from 20, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 8:
When dividing 80 by 12, we get 6 with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 6116.916
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
12 goes into 80 6 times with a remainder of 8.
The next digit of our result is 6. 
Result so far: 6116.9166
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 6116.9166 and a remainder of 8e-05.