15512374 divided by 257 
We want to figure out the number of times 15512374 can be divided by 257.

On to step 1:
1 divided by 257 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 257

Going ahead to step 2:
257 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 257

Moving on to step 3:
If we divide 155 by 257, we get 0 and a remainder of 155.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 155 to get 155.
Fetch the next digit (1) from the dividend, attach it to 155 and continue: 1551 / 257

Going ahead to step 4:
When dividing 1551 by 257, we get 6 with a remainder of 9.
The next digit of our result is 6. 
Result so far: 6.0
The remainder is 9 after subtracting 1542 from 1551.
Bring next digit (2) of the dividend behind the 9 and repeat the process: 92 / 257

Step 5:
257 can be fit into 92 0 times, resulting in a remainder of 92.
The next digit of our result is 0. 
Result so far: 60.0
If we subtract 0 from 92, we get 92.
Bring next digit (3) of the dividend behind the 92 and repeat the process: 923 / 257

Advancing to step 6:
257 goes into 923 3 times with a remainder of 152.
The number 3 becomes the next digit in our result. 
Result so far: 603.0
Deduct 771 from 923 and we're left with 152.
Fetch the next digit (7) from the dividend, attach it to 152 and continue: 1527 / 257

On to step 7:
If we divide 1527 by 257, we get 5 and a remainder of 242.
Put 5 as the next digit of the answer. 
Result so far: 6035.0
If we subtract 1285 from 1527, we get 242.
Grab the next digit (4) from the dividend, add it to 242, then carry on: 2424 / 257

Advancing to step 8:
2424 divided by 257 is 9 with a remainder of 111.
Record the quotient 9 as the next digit in the result. 
Result so far: 60359.0
Subtracting 2313 from 2424 leaves us with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Going ahead to step 9:
The number 257 fits into 1110 4 times, leaving a remainder of 82.
Use 4 as the next digit of our solution. 
Result so far: 60359.4
Subtract 1028 from 1110 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 10:
If we divide 820 by 257, we get 3 and a remainder of 49.
Write down 3 as next digit of the result. 
Result so far: 60359.43
Subtract 771 from 820 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 11:
When dividing 490 by 257, we get 1 with a remainder of 233.
Record the quotient 1 as the next digit in the result. 
Result so far: 60359.431
Subtract 257 from 490 to get 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Advancing to step 12:
The number 257 fits into 2330 9 times, leaving a remainder of 17.
The next digit of our result is 9. 
Result so far: 60359.4319
If we take 2313 away from 2330, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 13:
When dividing 170 by 257, we get 0 with a remainder of 170.
The number 0 becomes the next digit in our result. 
Result so far: 60359.4319
Subtract 0 from 170 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 14:
1700 divided by 257 is 6 with a remainder of 158.
The next digit of our result is 6. 
Result so far: 60359.431906
If we take 1542 away from 1700, we end up with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Step 15:
1580 divided by 257 is 6 with a remainder of 38.
The next digit of our result is 6. 
Result so far: 60359.4319066
Subtracting 1542 from 1580 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The final result is 60359.4319066 with a remainder of 3.8e-07.