We look at the division of 129210 by 55 
We're looking to find how many times 55 goes into 129210.

Moving on to step 1:
The number 55 fits into 1 0 times, leaving 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 / 55

Let's proceed to step 2:
When dividing 12 by 55, we get 0 with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 55

Moving on to step 3:
When dividing 129 by 55, we get 2 with a remainder of 19.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 110 away from 129, we end up with 19.
Bring next digit (2) of the dividend behind the 19 and repeat the process: 192 / 55

Going ahead to step 4:
55 can be fit into 192 3 times, resulting in a remainder of 27.
Use 3 as the next digit of our solution. 
Result so far: 23.0
The remainder is 27 after subtracting 165 from 192.
Include the next digit (1) from the dividend after 27, then repeat: 271 / 55

On to step 5:
If we divide 271 by 55, we get 4 and a remainder of 51.
Record the quotient 4 as the next digit in the result. 
Result so far: 234.0
Subtracting 220 from 271 leaves us with 51.
Take the next digit (0) from the dividend and append it to 51, then repeat: 510 / 55

Step 6:
If we divide 510 by 55, we get 9 and a remainder of 15.
The next digit of our result is 9. 
Result so far: 2349.0
Deduct 495 from 510 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
The number 55 fits into 150 2 times, leaving a remainder of 40.
The next digit of our result is 2. 
Result so far: 2349.2
Subtract 110 from 150 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.

Let's proceed to step 8:
55 goes into 400 7 times with a remainder of 15.
The number 7 becomes the next digit in our result. 
Result so far: 2349.27
Subtracting 385 from 400 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
When dividing 150 by 55, we get 2 with a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 2349.272
If we take 110 away from 150, we end up 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.

Advancing to step 10:
55 goes into 400 7 times with a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 2349.2727
Subtracting 385 from 400 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 11:
55 can be fit into 150 2 times, resulting in a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 2349.27272
Deduct 110 from 150 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 12:
The number 55 fits into 400 7 times, leaving a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 2349.272727
If we take 385 away from 400, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 13:
When dividing 150 by 55, we get 2 with a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 2349.2727272
Subtracting 110 from 150 leaves us 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.

On to step 14:
The number 55 fits into 400 7 times, leaving a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 2349.27272727
The remainder is 15 after subtracting 385 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 2349.27272727, with a leftover of 1.5e-08.