303845 ÷ 12 
Let's see how many times 12 fits into 303845.

Moving on to step 1:
If we divide 3 by 12, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 12

Step 2:
30 divided by 12 is 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 24 from 30 and we're left with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 12

Moving on to step 3:
12 can be fit into 63 5 times, resulting in a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 25.0
If we subtract 60 from 63, we get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 12

Going ahead to step 4:
12 goes into 38 3 times with a remainder of 2.
The next digit of our result is 3. 
Result so far: 253.0
If we subtract 36 from 38, we get 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 12

Step 5:
When dividing 24 by 12, we get 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2532.0
The remainder is 0 after subtracting 24 from 24.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 12

Step 6:
12 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 25320.0
If we take 0 away from 5, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
12 goes into 50 4 times with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 25320.4
If we take 48 away from 50, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
12 can be fit into 20 1 times, resulting in a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 25320.41
Subtracting 12 from 20 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
12 can be fit into 80 6 times, resulting in a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 25320.416
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
The number 12 fits into 80 6 times, leaving a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 25320.4166
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 25320.4166, and the remainder is 8e-05.