We look at the division of 12495240 by 285 
Our goal is to divide 12495240 by 285.

Step 1:
285 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 285

Going ahead to step 2:
The number 285 fits into 12 0 times, leaving a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 285

On to step 3:
124 divided by 285 is 0 with a remainder of 124.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 124 leaves us with 124.
Append the next digit (9) from the dividend to 124 and continue with: 1249 / 285

Moving on to step 4:
285 can be fit into 1249 4 times, resulting in a remainder of 109.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 109 after subtracting 1140 from 1249.
Bring next digit (5) of the dividend behind the 109 and repeat the process: 1095 / 285

Advancing to step 5:
1095 divided by 285 is 3 with a remainder of 240.
The next digit of our result is 3. 
Result so far: 43.0
Deduct 855 from 1095 and we're left with 240.
Take the next digit (2) from the dividend and append it to 240, then repeat: 2402 / 285

Advancing to step 6:
The number 285 fits into 2402 8 times, leaving a remainder of 122.
Put 8 as the next digit of the answer. 
Result so far: 438.0
Deduct 2280 from 2402 and we're left with 122.
Append the next digit (4) from the dividend to 122 and continue with: 1224 / 285

Going ahead to step 7:
If we divide 1224 by 285, we get 4 and a remainder of 84.
Use 4 as the next digit of our solution. 
Result so far: 4384.0
If we take 1140 away from 1224, we end up with 84.
Take the next digit (0) from the dividend and append it to 84, then repeat: 840 / 285

Advancing to step 8:
840 divided by 285 is 2 with a remainder of 270.
The next digit of our result is 2. 
Result so far: 43842.0
Subtracting 570 from 840 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Moving on to step 9:
The number 285 fits into 2700 9 times, leaving a remainder of 135.
Record the quotient 9 as the next digit in the result. 
Result so far: 43842.9
Subtracting 2565 from 2700 leaves us with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Going ahead to step 10:
1350 divided by 285 is 4 with a remainder of 210.
Record the quotient 4 as the next digit in the result. 
Result so far: 43842.94
If we subtract 1140 from 1350, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Step 11:
When dividing 2100 by 285, we get 7 with a remainder of 105.
Use 7 as the next digit of our solution. 
Result so far: 43842.947
If we subtract 1995 from 2100, we get 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Step 12:
The number 285 fits into 1050 3 times, leaving a remainder of 195.
Put 3 as the next digit of the answer. 
Result so far: 43842.9473
Subtracting 855 from 1050 leaves us with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Moving on to step 13:
285 goes into 1950 6 times with a remainder of 240.
Write down 6 as next digit of the result. 
Result so far: 43842.94736
Subtract 1710 from 1950 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 14:
The number 285 fits into 2400 8 times, leaving a remainder of 120.
The number 8 becomes the next digit in our result. 
Result so far: 43842.947368
If we take 2280 away from 2400, we end up 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.

Going ahead to step 15:
1200 divided by 285 is 4 with a remainder of 60.
The next digit of our result is 4. 
Result so far: 43842.9473684
Subtract 1140 from 1200 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 16:
285 can be fit into 600 2 times, resulting in a remainder of 30.
Record the quotient 2 as the next digit in the result. 
Result so far: 43842.94736842
Subtracting 570 from 600 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 43842.94736842, with a leftover of 3e-08.