42126482 divided by 345 
Our goal is to divide 42126482 by 345.

Moving on to step 1:
345 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 345

Going ahead to step 2:
If we divide 42 by 345, we get 0 and a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Append the next digit (1) from the dividend to 42 and continue with: 421 / 345

Going ahead to step 3:
If we divide 421 by 345, we get 1 and a remainder of 76.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 345 from 421 to get 76.
Bring next digit (2) of the dividend behind the 76 and repeat the process: 762 / 345

On to step 4:
When dividing 762 by 345, we get 2 with a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Subtracting 690 from 762 leaves us with 72.
Include the next digit (6) from the dividend after 72, then repeat: 726 / 345

Let's proceed to step 5:
345 goes into 726 2 times with a remainder of 36.
The number 2 becomes the next digit in our result. 
Result so far: 122.0
The remainder is 36 after subtracting 690 from 726.
Bring next digit (4) of the dividend behind the 36 and repeat the process: 364 / 345

On to step 6:
When dividing 364 by 345, we get 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 1221.0
Deduct 345 from 364 and we're left with 19.
Grab the next digit (8) from the dividend, add it to 19, then carry on: 198 / 345

Step 7:
345 goes into 198 0 times with a remainder of 198.
Write down 0 as next digit of the result. 
Result so far: 12210.0
Subtracting 0 from 198 leaves us with 198.
Append the next digit (2) from the dividend to 198 and continue with: 1982 / 345

Let's proceed to step 8:
345 can be fit into 1982 5 times, resulting in a remainder of 257.
Write down 5 as next digit of the result. 
Result so far: 122105.0
Subtracting 1725 from 1982 leaves us with 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

Step 9:
When dividing 2570 by 345, we get 7 with a remainder of 155.
Write down 7 as next digit of the result. 
Result so far: 122105.7
Subtracting 2415 from 2570 leaves us with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Moving on to step 10:
345 goes into 1550 4 times with a remainder of 170.
The number 4 becomes the next digit in our result. 
Result so far: 122105.74
Subtracting 1380 from 1550 leaves us with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 11:
The number 345 fits into 1700 4 times, leaving a remainder of 320.
Use 4 as the next digit of our solution. 
Result so far: 122105.744
Subtracting 1380 from 1700 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Our division results in 122105.744 with a remaining 0.032.