12875581 divided by 18 
We want to divide 12875581 by 18.

Step 1:
If we divide 1 by 18, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 18

Advancing to step 2:
18 can be fit into 12 0 times, resulting in a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 18

Going ahead to step 3:
When dividing 128 by 18, we get 7 with a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 126 away from 128, we end up with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 18

On to step 4:
If we divide 27 by 18, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 71.0
Subtracting 18 from 27 leaves us with 9.
Bring next digit (5) of the dividend behind the 9 and repeat the process: 95 / 18

Moving on to step 5:
95 divided by 18 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 715.0
Subtract 90 from 95 to get 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 18

Going ahead to step 6:
18 goes into 55 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 7153.0
Subtracting 54 from 55 leaves us with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 18

Step 7:
18 goes into 18 1 times with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 71531.0
Deduct 18 from 18 and we're left with 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 18

On to step 8:
1 divided by 18 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 715310.0
Subtracting 0 from 1 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 9:
18 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 715310.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 10:
If we divide 100 by 18, we get 5 and a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 715310.05
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 11:
The number 18 fits into 100 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 715310.055
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 715310.055 and a remainder of 0.001.