We're dividing 312428 by 42 
Let's see how many times 42 fits into 312428.

Advancing to step 1:
If we divide 3 by 42, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 42

On to step 2:
42 can be fit into 31 0 times, resulting in a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 31 to get 31.
Grab the next digit (2) from the dividend, add it to 31, then carry on: 312 / 42

Advancing to step 3:
312 divided by 42 is 7 with a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 18 after subtracting 294 from 312.
Include the next digit (4) from the dividend after 18, then repeat: 184 / 42

Moving on to step 4:
184 divided by 42 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 74.0
The remainder is 16 after subtracting 168 from 184.
Take the next digit (2) from the dividend and append it to 16, then repeat: 162 / 42

Let's proceed to step 5:
42 goes into 162 3 times with a remainder of 36.
The number 3 becomes the next digit in our result. 
Result so far: 743.0
Deduct 126 from 162 and we're left with 36.
Include the next digit (8) from the dividend after 36, then repeat: 368 / 42

Step 6:
The number 42 fits into 368 8 times, leaving a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 7438.0
The remainder is 32 after subtracting 336 from 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 7:
42 can be fit into 320 7 times, resulting in a remainder of 26.
Put 7 as the next digit of the answer. 
Result so far: 7438.7
Subtract 294 from 320 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 8:
42 goes into 260 6 times with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 7438.76
The remainder is 8 after subtracting 252 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
42 goes into 80 1 times with a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 7438.761
Deduct 42 from 80 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 10:
If we divide 380 by 42, we get 9 and a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 7438.7619
If we subtract 378 from 380, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
The number 42 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 7438.7619
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 12:
42 can be fit into 200 4 times, resulting in a remainder of 32.
Use 4 as the next digit of our solution. 
Result so far: 7438.761904
If we subtract 168 from 200, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 13:
If we divide 320 by 42, we get 7 and a remainder of 26.
Put 7 as the next digit of the answer. 
Result so far: 7438.7619047
If we subtract 294 from 320, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 14:
42 can be fit into 260 6 times, resulting in a remainder of 8.
The next digit of our result is 6. 
Result so far: 7438.76190476
Subtracting 252 from 260 leaves us 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.

Our division results in 7438.76190476 with a remaining 8e-09.