We look at the division of 324312 by 42 
Let's see how many times 42 fits into 324312.

Moving on to step 1:
The number 42 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 42

Going ahead to step 2:
42 goes into 32 0 times with a remainder of 32.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 32 leaves us with 32.
Take the next digit (4) from the dividend and append it to 32, then repeat: 324 / 42

Let's proceed to step 3:
324 divided by 42 is 7 with a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 294 from 324 to get 30.
Append the next digit (3) from the dividend to 30 and continue with: 303 / 42

On to step 4:
The number 42 fits into 303 7 times, leaving a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 77.0
If we subtract 294 from 303, we get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 42

Step 5:
The number 42 fits into 91 2 times, leaving a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 772.0
If we subtract 84 from 91, we get 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 42

On to step 6:
72 divided by 42 is 1 with a remainder of 30.
The next digit of our result is 1. 
Result so far: 7721.0
If we take 42 away from 72, 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:
300 divided by 42 is 7 with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 7721.7
Subtract 294 from 300 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
If we divide 60 by 42, we get 1 and a remainder of 18.
The next digit of our result is 1. 
Result so far: 7721.71
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 9:
If we divide 180 by 42, we get 4 and a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 7721.714
If we take 168 away from 180, 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.

Moving on to step 10:
If we divide 120 by 42, we get 2 and a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 7721.7142
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 11:
The number 42 fits into 360 8 times, leaving a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 7721.71428
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 12:
42 goes into 240 5 times with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 7721.714285
Deduct 210 from 240 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.

Step 13:
When dividing 300 by 42, we get 7 with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 7721.7142857
Subtract 294 from 300 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 14:
When dividing 60 by 42, we get 1 with a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 7721.71428571
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 7721.71428571 with a remaining 1.8e-08.