We look at the division of 139375 by 42 
Our goal is to divide 139375 by 42.

Let's proceed to step 1:
1 divided by 42 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 42

Going ahead to step 2:
The number 42 fits into 13 0 times, leaving a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 42

Let's proceed to step 3:
When dividing 139 by 42, we get 3 with a remainder of 13.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 126 from 139 to get 13.
Include the next digit (3) from the dividend after 13, then repeat: 133 / 42

Moving on to step 4:
133 divided by 42 is 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 33.0
If we subtract 126 from 133, we get 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 42

On to step 5:
When dividing 77 by 42, we get 1 with a remainder of 35.
Put 1 as the next digit of the answer. 
Result so far: 331.0
Deduct 42 from 77 and we're left with 35.
Bring next digit (5) of the dividend behind the 35 and repeat the process: 355 / 42

Going ahead to step 6:
42 goes into 355 8 times with a remainder of 19.
Use 8 as the next digit of our solution. 
Result so far: 3318.0
Subtract 336 from 355 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 7:
42 goes into 190 4 times with a remainder of 22.
Use 4 as the next digit of our solution. 
Result so far: 3318.4
If we subtract 168 from 190, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 8:
42 can be fit into 220 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 3318.45
Subtract 210 from 220 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
When dividing 100 by 42, we get 2 with a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 3318.452
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
160 divided by 42 is 3 with a remainder of 34.
Write down 3 as next digit of the result. 
Result so far: 3318.4523
If we take 126 away from 160, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 11:
If we divide 340 by 42, we get 8 and a remainder of 4.
The next digit of our result is 8. 
Result so far: 3318.45238
Subtract 336 from 340 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
40 divided by 42 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 3318.45238
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 13:
42 goes into 400 9 times with a remainder of 22.
Record the quotient 9 as the next digit in the result. 
Result so far: 3318.4523809
If we subtract 378 from 400, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 14:
220 divided by 42 is 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 3318.45238095
Subtract 210 from 220 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 3318.45238095 with a remaining 1e-08.