258749 divided by 51 
Let's see how many times 51 fits into 258749.

Advancing to step 1:
The number 51 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 51

Step 2:
When dividing 25 by 51, we get 0 with a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 25, we end up with 25.
Fetch the next digit (8) from the dividend, attach it to 25 and continue: 258 / 51

Let's proceed to step 3:
258 divided by 51 is 5 with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 255 from 258 to get 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 51

On to step 4:
When dividing 37 by 51, we get 0 with a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 50.0
If we subtract 0 from 37, we get 37.
Fetch the next digit (4) from the dividend, attach it to 37 and continue: 374 / 51

On to step 5:
When dividing 374 by 51, we get 7 with a remainder of 17.
The next digit of our result is 7. 
Result so far: 507.0
If we take 357 away from 374, we end up with 17.
Include the next digit (9) from the dividend after 17, then repeat: 179 / 51

On to step 6:
If we divide 179 by 51, we get 3 and a remainder of 26.
The next digit of our result is 3. 
Result so far: 5073.0
If we subtract 153 from 179, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 7:
260 divided by 51 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 5073.5
If we subtract 255 from 260, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 8:
The number 51 fits into 50 0 times, leaving a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 5073.5
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 9:
If we divide 500 by 51, we get 9 and a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 5073.509
If we subtract 459 from 500, we get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 10:
51 can be fit into 410 8 times, resulting in a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 5073.5098
If we subtract 408 from 410, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
20 divided by 51 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 5073.5098
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
200 divided by 51 is 3 with a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 5073.509803
Subtracting 153 from 200 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 13:
The number 51 fits into 470 9 times, leaving a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 5073.5098039
If we take 459 away from 470, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 14:
If we divide 110 by 51, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 5073.50980392
Subtract 102 from 110 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 5073.50980392, with a leftover of 8e-09.