We're dividing 12545566 by 900 
Let's see how many times 900 fits into 12545566.

On to step 1:
900 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 900

On to step 2:
900 can be fit into 12 0 times, resulting in a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 900

Moving on to step 3:
The number 900 fits into 125 0 times, leaving a remainder of 125.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 125, we get 125.
Grab the next digit (4) from the dividend, add it to 125, then carry on: 1254 / 900

On to step 4:
900 goes into 1254 1 times with a remainder of 354.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 900 from 1254, we get 354.
Grab the next digit (5) from the dividend, add it to 354, then carry on: 3545 / 900

Moving on to step 5:
3545 divided by 900 is 3 with a remainder of 845.
The next digit of our result is 3. 
Result so far: 13.0
Subtract 2700 from 3545 to get 845.
Take the next digit (5) from the dividend and append it to 845, then repeat: 8455 / 900

Advancing to step 6:
900 can be fit into 8455 9 times, resulting in a remainder of 355.
The number 9 becomes the next digit in our result. 
Result so far: 139.0
If we take 8100 away from 8455, we end up with 355.
Include the next digit (6) from the dividend after 355, then repeat: 3556 / 900

Let's proceed to step 7:
If we divide 3556 by 900, we get 3 and a remainder of 856.
Record the quotient 3 as the next digit in the result. 
Result so far: 1393.0
Subtract 2700 from 3556 to get 856.
Include the next digit (6) from the dividend after 856, then repeat: 8566 / 900

Let's proceed to step 8:
900 goes into 8566 9 times with a remainder of 466.
Put 9 as the next digit of the answer. 
Result so far: 13939.0
The remainder is 466 after subtracting 8100 from 8566.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

On to step 9:
If we divide 4660 by 900, we get 5 and a remainder of 160.
Write down 5 as next digit of the result. 
Result so far: 13939.5
If we take 4500 away from 4660, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 10:
900 can be fit into 1600 1 times, resulting in a remainder of 700.
Put 1 as the next digit of the answer. 
Result so far: 13939.51
Subtract 900 from 1600 to get 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Step 11:
The number 900 fits into 7000 7 times, leaving a remainder of 700.
Put 7 as the next digit of the answer. 
Result so far: 13939.517
Subtract 6300 from 7000 to get 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Advancing to step 12:
900 goes into 7000 7 times with a remainder of 700.
Write down 7 as next digit of the result. 
Result so far: 13939.5177
If we take 6300 away from 7000, we end up with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

After the division, we end up with 13939.5177 and a remainder of 0.007.