42117915 ÷ 353 
Our goal is to divide 42117915 by 353.

On to step 1:
If we divide 4 by 353, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 353

Step 2:
353 goes into 42 0 times with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Grab the next digit (1) from the dividend, add it to 42, then carry on: 421 / 353

Going ahead to step 3:
If we divide 421 by 353, we get 1 and a remainder of 68.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 353 away from 421, we end up with 68.
Include the next digit (1) from the dividend after 68, then repeat: 681 / 353

Step 4:
353 goes into 681 1 times with a remainder of 328.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtract 353 from 681 to get 328.
Grab the next digit (7) from the dividend, add it to 328, then carry on: 3287 / 353

Moving on to step 5:
If we divide 3287 by 353, we get 9 and a remainder of 110.
Record the quotient 9 as the next digit in the result. 
Result so far: 119.0
Subtracting 3177 from 3287 leaves us with 110.
Bring next digit (9) of the dividend behind the 110 and repeat the process: 1109 / 353

Advancing to step 6:
353 can be fit into 1109 3 times, resulting in a remainder of 50.
Use 3 as the next digit of our solution. 
Result so far: 1193.0
Subtracting 1059 from 1109 leaves us with 50.
Append the next digit (1) from the dividend to 50 and continue with: 501 / 353

Let's proceed to step 7:
If we divide 501 by 353, we get 1 and a remainder of 148.
Put 1 as the next digit of the answer. 
Result so far: 11931.0
Subtract 353 from 501 to get 148.
Include the next digit (5) from the dividend after 148, then repeat: 1485 / 353

Step 8:
353 can be fit into 1485 4 times, resulting in a remainder of 73.
Use 4 as the next digit of our solution. 
Result so far: 119314.0
Deduct 1412 from 1485 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 9:
If we divide 730 by 353, we get 2 and a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 119314.2
The remainder is 24 after subtracting 706 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 10:
240 divided by 353 is 0 with a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 119314.2
If we subtract 0 from 240, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Going ahead to step 11:
353 goes into 2400 6 times with a remainder of 282.
Put 6 as the next digit of the answer. 
Result so far: 119314.206
Subtract 2118 from 2400 to get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

On to step 12:
2820 divided by 353 is 7 with a remainder of 349.
Write down 7 as next digit of the result. 
Result so far: 119314.2067
If we take 2471 away from 2820, we end up with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Going ahead to step 13:
The number 353 fits into 3490 9 times, leaving a remainder of 313.
The number 9 becomes the next digit in our result. 
Result so far: 119314.20679
If we take 3177 away from 3490, we end up with 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Step 14:
353 goes into 3130 8 times with a remainder of 306.
The number 8 becomes the next digit in our result. 
Result so far: 119314.206798
Deduct 2824 from 3130 and we're left with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Step 15:
353 goes into 3060 8 times with a remainder of 236.
Put 8 as the next digit of the answer. 
Result so far: 119314.2067988
Subtracting 2824 from 3060 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 119314.2067988 and a remainder of 2.36e-06.