We divide 128742 by 51
We want to figure out the number of times 128742 can be divided by 51.

Advancing to step 1:
51 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 51

Going ahead to step 2:
51 goes into 12 0 times with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 51

On to step 3:
51 can be fit into 128 2 times, resulting in a remainder of 26.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 102 from 128 and we're left with 26.
Append the next digit (7) from the dividend to 26 and continue with: 267 / 51

Step 4:
When dividing 267 by 51, we get 5 with a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 25.0
The remainder is 12 after subtracting 255 from 267.
Fetch the next digit (4) from the dividend, attach it to 12 and continue: 124 / 51

Advancing to step 5:
51 can be fit into 124 2 times, resulting in a remainder of 22.
Put 2 as the next digit of the answer. 
Result so far: 252.0
If we take 102 away from 124, we end up with 22.
Fetch the next digit (2) from the dividend, attach it to 22 and continue: 222 / 51

Moving on to step 6:
222 divided by 51 is 4 with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 2524.0
Deduct 204 from 222 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
When dividing 180 by 51, we get 3 with a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 2524.3
Subtracting 153 from 180 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 8:
The number 51 fits into 270 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 2524.35
Subtracting 255 from 270 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.

Let's proceed to step 9:
51 can be fit into 150 2 times, resulting in a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 2524.352
The remainder is 48 after subtracting 102 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 10:
51 can be fit into 480 9 times, resulting in a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 2524.3529
Subtracting 459 from 480 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 11:
The number 51 fits into 210 4 times, leaving a remainder of 6.
The next digit of our result is 4. 
Result so far: 2524.35294
If we take 204 away from 210, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 12:
60 divided by 51 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 2524.352941
Deduct 51 from 60 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 13:
51 goes into 90 1 times with a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 2524.3529411
Subtract 51 from 90 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final result is 2524.3529411 with a remainder of 3.9e-07.