Let's divide 129736 by 42
Let's see how many times 42 fits into 129736.

Step 1:
42 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 42

On to step 2:
The number 42 fits into 12 0 times, leaving a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 42

Going ahead to step 3:
If we divide 129 by 42, we get 3 and a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 126 from 129 to get 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 42

Moving on to step 4:
If we divide 37 by 42, we get 0 and a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 30.0
If we subtract 0 from 37, we get 37.
Bring next digit (3) of the dividend behind the 37 and repeat the process: 373 / 42

Step 5:
373 divided by 42 is 8 with a remainder of 37.
Write down 8 as next digit of the result. 
Result so far: 308.0
If we take 336 away from 373, we end up with 37.
Grab the next digit (6) from the dividend, add it to 37, then carry on: 376 / 42

Step 6:
42 goes into 376 8 times with a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 3088.0
Subtract 336 from 376 to 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.

Moving on to step 7:
When dividing 400 by 42, we get 9 with a remainder of 22.
The next digit of our result is 9. 
Result so far: 3088.9
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.

Moving on to step 8:
220 divided by 42 is 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 3088.95
The remainder is 10 after subtracting 210 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
When dividing 100 by 42, we get 2 with a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 3088.952
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
If we divide 160 by 42, we get 3 and a remainder of 34.
The next digit of our result is 3. 
Result so far: 3088.9523
Subtract 126 from 160 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 11:
If we divide 340 by 42, we get 8 and a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 3088.95238
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.

Moving on to step 12:
40 divided by 42 is 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 3088.95238
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 13:
42 can be fit into 400 9 times, resulting in a remainder of 22.
Use 9 as the next digit of our solution. 
Result so far: 3088.9523809
If we take 378 away from 400, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 14:
When dividing 220 by 42, we get 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 3088.95238095
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.

The final outcome is 3088.95238095, with a leftover of 1e-08.