We look at the division of 42017888 by 342 
Our goal is to divide 42017888 by 342.

Step 1:
If we divide 4 by 342, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 342

Going ahead to step 2:
The number 342 fits into 42 0 times, leaving a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Append the next digit (0) from the dividend to 42 and continue with: 420 / 342

Step 3:
342 goes into 420 1 times with a remainder of 78.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 78 after subtracting 342 from 420.
Fetch the next digit (1) from the dividend, attach it to 78 and continue: 781 / 342

Advancing to step 4:
342 can be fit into 781 2 times, resulting in a remainder of 97.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 684 from 781, we get 97.
Take the next digit (7) from the dividend and append it to 97, then repeat: 977 / 342

Advancing to step 5:
342 goes into 977 2 times with a remainder of 293.
Put 2 as the next digit of the answer. 
Result so far: 122.0
If we subtract 684 from 977, we get 293.
Fetch the next digit (8) from the dividend, attach it to 293 and continue: 2938 / 342

Going ahead to step 6:
342 goes into 2938 8 times with a remainder of 202.
Use 8 as the next digit of our solution. 
Result so far: 1228.0
If we take 2736 away from 2938, we end up with 202.
Append the next digit (8) from the dividend to 202 and continue with: 2028 / 342

Step 7:
When dividing 2028 by 342, we get 5 with a remainder of 318.
Record the quotient 5 as the next digit in the result. 
Result so far: 12285.0
Subtracting 1710 from 2028 leaves us with 318.
Append the next digit (8) from the dividend to 318 and continue with: 3188 / 342

Let's proceed to step 8:
3188 divided by 342 is 9 with a remainder of 110.
Use 9 as the next digit of our solution. 
Result so far: 122859.0
Subtract 3078 from 3188 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 9:
342 goes into 1100 3 times with a remainder of 74.
Put 3 as the next digit of the answer. 
Result so far: 122859.3
If we subtract 1026 from 1100, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 10:
When dividing 740 by 342, we get 2 with a remainder of 56.
Record the quotient 2 as the next digit in the result. 
Result so far: 122859.32
If we take 684 away from 740, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 11:
If we divide 560 by 342, we get 1 and a remainder of 218.
Put 1 as the next digit of the answer. 
Result so far: 122859.321
Subtracting 342 from 560 leaves us with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 12:
If we divide 2180 by 342, we get 6 and a remainder of 128.
The number 6 becomes the next digit in our result. 
Result so far: 122859.3216
If we subtract 2052 from 2180, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

On to step 13:
342 goes into 1280 3 times with a remainder of 254.
Put 3 as the next digit of the answer. 
Result so far: 122859.32163
Deduct 1026 from 1280 and we're left with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Step 14:
2540 divided by 342 is 7 with a remainder of 146.
Record the quotient 7 as the next digit in the result. 
Result so far: 122859.321637
Deduct 2394 from 2540 and we're left with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Moving on to step 15:
342 goes into 1460 4 times with a remainder of 92.
Write down 4 as next digit of the result. 
Result so far: 122859.3216374
Subtracting 1368 from 1460 leaves us with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Going ahead to step 16:
If we divide 920 by 342, we get 2 and a remainder of 236.
Use 2 as the next digit of our solution. 
Result so far: 122859.32163742
Subtracting 684 from 920 leaves us with 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

After the division, we end up with 122859.32163742 and a remainder of 2.36e-07.