15131257 ÷ 560 
We want to figure out the number of times 15131257 can be divided by 560.

Going ahead to step 1:
560 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 560

Going ahead to step 2:
560 goes into 15 0 times with a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 560

Step 3:
151 divided by 560 is 0 with a remainder of 151.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 151, we get 151.
Append the next digit (3) from the dividend to 151 and continue with: 1513 / 560

Moving on to step 4:
560 can be fit into 1513 2 times, resulting in a remainder of 393.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1120 from 1513 leaves us with 393.
Bring next digit (1) of the dividend behind the 393 and repeat the process: 3931 / 560

Moving on to step 5:
The number 560 fits into 3931 7 times, leaving a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Subtracting 3920 from 3931 leaves us with 11.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 560

Let's proceed to step 6:
The number 560 fits into 112 0 times, leaving a remainder of 112.
Record the quotient 0 as the next digit in the result. 
Result so far: 270.0
If we subtract 0 from 112, we get 112.
Include the next digit (5) from the dividend after 112, then repeat: 1125 / 560

Advancing to step 7:
If we divide 1125 by 560, we get 2 and a remainder of 5.
The next digit of our result is 2. 
Result so far: 2702.0
Deduct 1120 from 1125 and we're left with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 560

Advancing to step 8:
When dividing 57 by 560, we get 0 with a remainder of 57.
Use 0 as the next digit of our solution. 
Result so far: 27020.0
If we subtract 0 from 57, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 9:
560 can be fit into 570 1 times, resulting in a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 27020.1
Subtract 560 from 570 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
560 can be fit into 100 0 times, resulting in a remainder of 100.
The next digit of our result is 0. 
Result so far: 27020.1
Subtract 0 from 100 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 11:
The number 560 fits into 1000 1 times, leaving a remainder of 440.
Record the quotient 1 as the next digit in the result. 
Result so far: 27020.101
Deduct 560 from 1000 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Advancing to step 12:
If we divide 4400 by 560, we get 7 and a remainder of 480.
Record the quotient 7 as the next digit in the result. 
Result so far: 27020.1017
If we take 3920 away from 4400, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 13:
The number 560 fits into 4800 8 times, leaving a remainder of 320.
The next digit of our result is 8. 
Result so far: 27020.10178
Subtracting 4480 from 4800 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 14:
560 can be fit into 3200 5 times, resulting in a remainder of 400.
Record the quotient 5 as the next digit in the result. 
Result so far: 27020.101785
Subtracting 2800 from 3200 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Advancing to step 15:
4000 divided by 560 is 7 with a remainder of 80.
The number 7 becomes the next digit in our result. 
Result so far: 27020.1017857
Deduct 3920 from 4000 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 16:
560 goes into 800 1 times with a remainder of 240.
Record the quotient 1 as the next digit in the result. 
Result so far: 27020.10178571
If we take 560 away from 800, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

The final outcome is 27020.10178571, with a leftover of 2.4e-07.