129142 divided by 43 
Our goal is to divide 129142 by 43.

On to step 1:
43 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 43

Step 2:
If we divide 12 by 43, we get 0 and a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 43

Moving on to step 3:
The number 43 fits into 129 3 times, leaving a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 129 away from 129, we end up with 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 43

Let's proceed to step 4:
The number 43 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 30.0
If we take 0 away from 1, we end up with 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 43

On to step 5:
The number 43 fits into 14 0 times, leaving a remainder of 14.
The next digit of our result is 0. 
Result so far: 300.0
If we subtract 0 from 14, we get 14.
Bring next digit (2) of the dividend behind the 14 and repeat the process: 142 / 43

Let's proceed to step 6:
The number 43 fits into 142 3 times, leaving a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 3003.0
Subtracting 129 from 142 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
When dividing 130 by 43, we get 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 3003.3
Deduct 129 from 130 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 8:
The number 43 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 3003.3
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
If we divide 100 by 43, we get 2 and a remainder of 14.
The next digit of our result is 2. 
Result so far: 3003.302
The remainder is 14 after subtracting 86 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 10:
43 can be fit into 140 3 times, resulting in a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 3003.3023
If we subtract 129 from 140, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 11:
43 can be fit into 110 2 times, resulting in a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 3003.30232
If we subtract 86 from 110, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 12:
The number 43 fits into 240 5 times, leaving a remainder of 25.
The next digit of our result is 5. 
Result so far: 3003.302325
The remainder is 25 after subtracting 215 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 13:
If we divide 250 by 43, we get 5 and a remainder of 35.
The next digit of our result is 5. 
Result so far: 3003.3023255
If we subtract 215 from 250, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

After the division, we end up with 3003.3023255 and a remainder of 3.5e-07.