15809518 ÷ 880 
We want to figure out the number of times 15809518 can be divided by 880.

Advancing to step 1:
880 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.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 880

Going ahead to step 2:
880 can be fit into 15 0 times, resulting in a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 880

On to step 3:
880 can be fit into 158 0 times, resulting in a remainder of 158.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 158 and we're left with 158.
Include the next digit (0) from the dividend after 158, then repeat: 1580 / 880

Going ahead to step 4:
880 goes into 1580 1 times with a remainder of 700.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 880 from 1580 and we're left with 700.
Append the next digit (9) from the dividend to 700 and continue with: 7009 / 880

Step 5:
880 can be fit into 7009 7 times, resulting in a remainder of 849.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we subtract 6160 from 7009, we get 849.
Take the next digit (5) from the dividend and append it to 849, then repeat: 8495 / 880

Let's proceed to step 6:
880 can be fit into 8495 9 times, resulting in a remainder of 575.
Record the quotient 9 as the next digit in the result. 
Result so far: 179.0
Subtracting 7920 from 8495 leaves us with 575.
Include the next digit (1) from the dividend after 575, then repeat: 5751 / 880

Step 7:
880 goes into 5751 6 times with a remainder of 471.
The number 6 becomes the next digit in our result. 
Result so far: 1796.0
If we take 5280 away from 5751, we end up with 471.
Bring next digit (8) of the dividend behind the 471 and repeat the process: 4718 / 880

Moving on to step 8:
880 goes into 4718 5 times with a remainder of 318.
Use 5 as the next digit of our solution. 
Result so far: 17965.0
Deduct 4400 from 4718 and we're left with 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

On to step 9:
3180 divided by 880 is 3 with a remainder of 540.
Put 3 as the next digit of the answer. 
Result so far: 17965.3
If we take 2640 away from 3180, we end up with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

On to step 10:
When dividing 5400 by 880, we get 6 with a remainder of 120.
Record the quotient 6 as the next digit in the result. 
Result so far: 17965.36
Subtracting 5280 from 5400 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 11:
1200 divided by 880 is 1 with a remainder of 320.
The next digit of our result is 1. 
Result so far: 17965.361
If we take 880 away from 1200, we end up 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.

On to step 12:
If we divide 3200 by 880, we get 3 and a remainder of 560.
Use 3 as the next digit of our solution. 
Result so far: 17965.3613
Subtracting 2640 from 3200 leaves us with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 13:
The number 880 fits into 5600 6 times, leaving a remainder of 320.
Put 6 as the next digit of the answer. 
Result so far: 17965.36136
The remainder is 320 after subtracting 5280 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 14:
If we divide 3200 by 880, we get 3 and a remainder of 560.
Record the quotient 3 as the next digit in the result. 
Result so far: 17965.361363
Subtract 2640 from 3200 to get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

On to step 15:
880 can be fit into 5600 6 times, resulting in a remainder of 320.
Record the quotient 6 as the next digit in the result. 
Result so far: 17965.3613636
Subtract 5280 from 5600 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Advancing to step 16:
The number 880 fits into 3200 3 times, leaving a remainder of 560.
The next digit of our result is 3. 
Result so far: 17965.36136363
The remainder is 560 after subtracting 2640 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

After the division, we end up with 17965.36136363 and a remainder of 5.6e-07.