We're dividing 339288 by 42 
Let's see how many times 42 fits into 339288.

Advancing to step 1:
If we divide 3 by 42, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 42

On to step 2:
42 goes into 33 0 times with a remainder of 33.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 33 after subtracting 0 from 33.
Bring next digit (9) of the dividend behind the 33 and repeat the process: 339 / 42

On to step 3:
If we divide 339 by 42, we get 8 and a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 3 after subtracting 336 from 339.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 42

Going ahead to step 4:
If we divide 32 by 42, we get 0 and a remainder of 32.
Use 0 as the next digit of our solution. 
Result so far: 80.0
The remainder is 32 after subtracting 0 from 32.
Fetch the next digit (8) from the dividend, attach it to 32 and continue: 328 / 42

On to step 5:
If we divide 328 by 42, we get 7 and a remainder of 34.
Write down 7 as next digit of the result. 
Result so far: 807.0
Subtract 294 from 328 to get 34.
Include the next digit (8) from the dividend after 34, then repeat: 348 / 42

Step 6:
The number 42 fits into 348 8 times, leaving a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 8078.0
If we take 336 away from 348, 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:
The number 42 fits into 120 2 times, leaving a remainder of 36.
The number 2 becomes the next digit in our result. 
Result so far: 8078.2
Subtract 84 from 120 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 8:
The number 42 fits into 360 8 times, leaving a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 8078.28
Deduct 336 from 360 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 9:
When dividing 240 by 42, we get 5 with a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 8078.285
If we take 210 away from 240, 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.

Advancing to step 10:
The number 42 fits into 300 7 times, leaving a remainder of 6.
The next digit of our result is 7. 
Result so far: 8078.2857
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 11:
60 divided by 42 is 1 with a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 8078.28571
If we take 42 away from 60, we end up 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.

Let's proceed to step 12:
42 can be fit into 180 4 times, resulting in a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 8078.285714
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 13:
The number 42 fits into 120 2 times, leaving a remainder of 36.
Record the quotient 2 as the next digit in the result. 
Result so far: 8078.2857142
Deduct 84 from 120 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 14:
42 can be fit into 360 8 times, resulting in a remainder of 24.
The next digit of our result is 8. 
Result so far: 8078.28571428
Subtracting 336 from 360 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

After the division, we end up with 8078.28571428 and a remainder of 2.4e-08.