We look at the division of 312009 by 83 
We want to divide 312009 by 83.

Moving on to step 1:
3 divided by 83 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 83

On to step 2:
When dividing 31 by 83, we get 0 with a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 31, we end up with 31.
Grab the next digit (2) from the dividend, add it to 31, then carry on: 312 / 83

Step 3:
If we divide 312 by 83, we get 3 and a remainder of 63.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 249 from 312 to get 63.
Bring next digit (0) of the dividend behind the 63 and repeat the process: 630 / 83

Step 4:
630 divided by 83 is 7 with a remainder of 49.
Use 7 as the next digit of our solution. 
Result so far: 37.0
Subtracting 581 from 630 leaves us with 49.
Append the next digit (0) from the dividend to 49 and continue with: 490 / 83

On to step 5:
83 can be fit into 490 5 times, resulting in a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 375.0
Deduct 415 from 490 and we're left with 75.
Include the next digit (9) from the dividend after 75, then repeat: 759 / 83

Moving on to step 6:
If we divide 759 by 83, we get 9 and a remainder of 12.
The next digit of our result is 9. 
Result so far: 3759.0
If we take 747 away from 759, we end up 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.

Going ahead to step 7:
If we divide 120 by 83, we get 1 and a remainder of 37.
The next digit of our result is 1. 
Result so far: 3759.1
If we take 83 away from 120, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 8:
If we divide 370 by 83, we get 4 and a remainder of 38.
Use 4 as the next digit of our solution. 
Result so far: 3759.14
Deduct 332 from 370 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 9:
83 goes into 380 4 times with a remainder of 48.
Use 4 as the next digit of our solution. 
Result so far: 3759.144
If we subtract 332 from 380, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Our division results in 3759.144 with a remaining 0.0048.