42120133 ÷ 354 
Our goal is to divide 42120133 by 354.

On to step 1:
354 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 354

Advancing to step 2:
354 goes into 42 0 times with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Include the next digit (1) from the dividend after 42, then repeat: 421 / 354

Moving on to step 3:
If we divide 421 by 354, we get 1 and a remainder of 67.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 354 from 421 and we're left with 67.
Grab the next digit (2) from the dividend, add it to 67, then carry on: 672 / 354

Going ahead to step 4:
If we divide 672 by 354, we get 1 and a remainder of 318.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtracting 354 from 672 leaves us with 318.
Include the next digit (0) from the dividend after 318, then repeat: 3180 / 354

Let's proceed to step 5:
The number 354 fits into 3180 8 times, leaving a remainder of 348.
Record the quotient 8 as the next digit in the result. 
Result so far: 118.0
Deduct 2832 from 3180 and we're left with 348.
Grab the next digit (1) from the dividend, add it to 348, then carry on: 3481 / 354

Advancing to step 6:
354 can be fit into 3481 9 times, resulting in a remainder of 295.
Record the quotient 9 as the next digit in the result. 
Result so far: 1189.0
Deduct 3186 from 3481 and we're left with 295.
Bring next digit (3) of the dividend behind the 295 and repeat the process: 2953 / 354

Step 7:
354 can be fit into 2953 8 times, resulting in a remainder of 121.
Put 8 as the next digit of the answer. 
Result so far: 11898.0
The remainder is 121 after subtracting 2832 from 2953.
Bring next digit (3) of the dividend behind the 121 and repeat the process: 1213 / 354

On to step 8:
354 can be fit into 1213 3 times, resulting in a remainder of 151.
Put 3 as the next digit of the answer. 
Result so far: 118983.0
The remainder is 151 after subtracting 1062 from 1213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Advancing to step 9:
The number 354 fits into 1510 4 times, leaving a remainder of 94.
The number 4 becomes the next digit in our result. 
Result so far: 118983.4
Subtracting 1416 from 1510 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Moving on to step 10:
354 can be fit into 940 2 times, resulting in a remainder of 232.
The number 2 becomes the next digit in our result. 
Result so far: 118983.42
If we take 708 away from 940, we end up with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Let's proceed to step 11:
If we divide 2320 by 354, we get 6 and a remainder of 196.
The number 6 becomes the next digit in our result. 
Result so far: 118983.426
Deduct 2124 from 2320 and we're left with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Going ahead to step 12:
If we divide 1960 by 354, we get 5 and a remainder of 190.
The number 5 becomes the next digit in our result. 
Result so far: 118983.4265
If we subtract 1770 from 1960, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Let's proceed to step 13:
1900 divided by 354 is 5 with a remainder of 130.
Put 5 as the next digit of the answer. 
Result so far: 118983.42655
Deduct 1770 from 1900 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

In conclusion, the division gives 118983.42655 with a balance of 0.00013.