12856617 ÷ 303 
Let's see how many times 303 fits into 12856617.

Let's proceed to step 1:
303 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our 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 / 303

Let's proceed to step 2:
If we divide 12 by 303, we get 0 and a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 303

Step 3:
If we divide 128 by 303, we get 0 and a remainder of 128.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 128, we get 128.
Bring next digit (5) of the dividend behind the 128 and repeat the process: 1285 / 303

Let's proceed to step 4:
If we divide 1285 by 303, we get 4 and a remainder of 73.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 1212 from 1285 and we're left with 73.
Bring next digit (6) of the dividend behind the 73 and repeat the process: 736 / 303

Step 5:
303 goes into 736 2 times with a remainder of 130.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we take 606 away from 736, we end up with 130.
Grab the next digit (6) from the dividend, add it to 130, then carry on: 1306 / 303

On to step 6:
303 goes into 1306 4 times with a remainder of 94.
Write down 4 as next digit of the result. 
Result so far: 424.0
If we subtract 1212 from 1306, we get 94.
Bring next digit (1) of the dividend behind the 94 and repeat the process: 941 / 303

Going ahead to step 7:
The number 303 fits into 941 3 times, leaving a remainder of 32.
The next digit of our result is 3. 
Result so far: 4243.0
If we take 909 away from 941, we end up with 32.
Fetch the next digit (7) from the dividend, attach it to 32 and continue: 327 / 303

On to step 8:
If we divide 327 by 303, we get 1 and a remainder of 24.
Use 1 as the next digit of our solution. 
Result so far: 42431.0
Deduct 303 from 327 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 9:
If we divide 240 by 303, we get 0 and a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 42431.0
Subtract 0 from 240 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.

Step 10:
2400 divided by 303 is 7 with a remainder of 279.
The number 7 becomes the next digit in our result. 
Result so far: 42431.07
If we subtract 2121 from 2400, we get 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Step 11:
2790 divided by 303 is 9 with a remainder of 63.
Write down 9 as next digit of the result. 
Result so far: 42431.079
Subtracting 2727 from 2790 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Let's proceed to step 12:
The number 303 fits into 630 2 times, leaving a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 42431.0792
Subtract 606 from 630 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 13:
240 divided by 303 is 0 with a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 42431.0792
Deduct 0 from 240 and we're left 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.

Going ahead to step 14:
303 can be fit into 2400 7 times, resulting in a remainder of 279.
Record the quotient 7 as the next digit in the result. 
Result so far: 42431.079207
If we take 2121 away from 2400, we end up with 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Advancing to step 15:
303 goes into 2790 9 times with a remainder of 63.
Put 9 as the next digit of the answer. 
Result so far: 42431.0792079
Subtracting 2727 from 2790 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 16:
630 divided by 303 is 2 with a remainder of 24.
The next digit of our result is 2. 
Result so far: 42431.07920792
Subtracting 606 from 630 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 42431.07920792 with a remainder of 2.4e-08.