259918 divided by 51 
We want to figure out the number of times 259918 can be divided by 51.

Going ahead to step 1:
If we divide 2 by 51, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 51

Advancing to step 2:
51 goes into 25 0 times with a remainder of 25.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Grab the next digit (9) from the dividend, add it to 25, then carry on: 259 / 51

Let's proceed to step 3:
259 divided by 51 is 5 with a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 255 from 259 and we're left with 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 51

Step 4:
When dividing 49 by 51, we get 0 with a remainder of 49.
Record the quotient 0 as the next digit in the result. 
Result so far: 50.0
Subtracting 0 from 49 leaves us with 49.
Fetch the next digit (1) from the dividend, attach it to 49 and continue: 491 / 51

Moving on to step 5:
51 can be fit into 491 9 times, resulting in a remainder of 32.
Write down 9 as next digit of the result. 
Result so far: 509.0
Subtract 459 from 491 to get 32.
Fetch the next digit (8) from the dividend, attach it to 32 and continue: 328 / 51

Moving on to step 6:
328 divided by 51 is 6 with a remainder of 22.
The next digit of our result is 6. 
Result so far: 5096.0
If we subtract 306 from 328, 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.

On to step 7:
The number 51 fits into 220 4 times, leaving a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 5096.4
Subtract 204 from 220 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.

Advancing to step 8:
51 goes into 160 3 times with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 5096.43
If we take 153 away from 160, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 9:
70 divided by 51 is 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 5096.431
The remainder is 19 after subtracting 51 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 10:
The number 51 fits into 190 3 times, leaving a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 5096.4313
If we take 153 away from 190, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 11:
51 can be fit into 370 7 times, resulting in a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 5096.43137
Subtracting 357 from 370 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.

On to step 12:
51 can be fit into 130 2 times, resulting in a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 5096.431372
Deduct 102 from 130 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 13:
If we divide 280 by 51, we get 5 and a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 5096.4313725
Subtracting 255 from 280 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 14:
51 can be fit into 250 4 times, resulting in a remainder of 46.
Use 4 as the next digit of our solution. 
Result so far: 5096.43137254
Subtracting 204 from 250 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final result is 5096.43137254 with a remainder of 4.6e-08.