We look at the division of 42799278 by 345 
Our goal is to divide 42799278 by 345.

Step 1:
345 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 345

Moving on to step 2:
345 can be fit into 42 0 times, resulting in a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Include the next digit (7) from the dividend after 42, then repeat: 427 / 345

Moving on to step 3:
If we divide 427 by 345, we get 1 and a remainder of 82.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 345 from 427 leaves us with 82.
Grab the next digit (9) from the dividend, add it to 82, then carry on: 829 / 345

Going ahead to step 4:
If we divide 829 by 345, we get 2 and a remainder of 139.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 690 from 829 leaves us with 139.
Include the next digit (9) from the dividend after 139, then repeat: 1399 / 345

Going ahead to step 5:
1399 divided by 345 is 4 with a remainder of 19.
The number 4 becomes the next digit in our result. 
Result so far: 124.0
Subtract 1380 from 1399 to get 19.
Bring next digit (2) of the dividend behind the 19 and repeat the process: 192 / 345

Let's proceed to step 6:
345 can be fit into 192 0 times, resulting in a remainder of 192.
The number 0 becomes the next digit in our result. 
Result so far: 1240.0
Subtracting 0 from 192 leaves us with 192.
Bring next digit (7) of the dividend behind the 192 and repeat the process: 1927 / 345

Moving on to step 7:
345 can be fit into 1927 5 times, resulting in a remainder of 202.
The next digit of our result is 5. 
Result so far: 12405.0
Subtracting 1725 from 1927 leaves us with 202.
Include the next digit (8) from the dividend after 202, then repeat: 2028 / 345

Step 8:
2028 divided by 345 is 5 with a remainder of 303.
The number 5 becomes the next digit in our result. 
Result so far: 124055.0
If we subtract 1725 from 2028, we get 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Moving on to step 9:
345 can be fit into 3030 8 times, resulting in a remainder of 270.
Write down 8 as next digit of the result. 
Result so far: 124055.8
Subtracting 2760 from 3030 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Let's proceed to step 10:
When dividing 2700 by 345, we get 7 with a remainder of 285.
Record the quotient 7 as the next digit in the result. 
Result so far: 124055.87
If we subtract 2415 from 2700, we get 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Moving on to step 11:
2850 divided by 345 is 8 with a remainder of 90.
Put 8 as the next digit of the answer. 
Result so far: 124055.878
Subtracting 2760 from 2850 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 12:
345 can be fit into 900 2 times, resulting in a remainder of 210.
Put 2 as the next digit of the answer. 
Result so far: 124055.8782
If we subtract 690 from 900, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Advancing to step 13:
If we divide 2100 by 345, we get 6 and a remainder of 30.
The number 6 becomes the next digit in our result. 
Result so far: 124055.87826
Deduct 2070 from 2100 and we're left 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.

On to step 14:
If we divide 300 by 345, we get 0 and a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 124055.87826
Subtract 0 from 300 to get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 15:
When dividing 3000 by 345, we get 8 with a remainder of 240.
The number 8 becomes the next digit in our result. 
Result so far: 124055.8782608
Deduct 2760 from 3000 and we're left with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Step 16:
345 can be fit into 2400 6 times, resulting in a remainder of 330.
Use 6 as the next digit of our solution. 
Result so far: 124055.87826086
Deduct 2070 from 2400 and we're left with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

The final outcome is 124055.87826086, with a leftover of 3.3e-07.