We're dividing 306489 by 42 
Our goal is to divide 306489 by 42.

Moving on to step 1:
When dividing 3 by 42, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 42

Moving on to step 2:
The number 42 fits into 30 0 times, leaving a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 30, we end up with 30.
Include the next digit (6) from the dividend after 30, then repeat: 306 / 42

Going ahead to step 3:
The number 42 fits into 306 7 times, leaving a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 294 from 306 leaves us with 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 42

Advancing to step 4:
42 can be fit into 124 2 times, resulting in a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 72.0
If we subtract 84 from 124, we get 40.
Append the next digit (8) from the dividend to 40 and continue with: 408 / 42

Going ahead to step 5:
42 can be fit into 408 9 times, resulting in a remainder of 30.
Write down 9 as next digit of the result. 
Result so far: 729.0
Deduct 378 from 408 and we're left with 30.
Bring next digit (9) of the dividend behind the 30 and repeat the process: 309 / 42

Moving on to step 6:
When dividing 309 by 42, we get 7 with a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 7297.0
Subtracting 294 from 309 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
150 divided by 42 is 3 with a remainder of 24.
The next digit of our result is 3. 
Result so far: 7297.3
If we subtract 126 from 150, we 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.

Going ahead to step 8:
42 can be fit into 240 5 times, resulting in a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 7297.35
Subtracting 210 from 240 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.

On to step 9:
300 divided by 42 is 7 with a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 7297.357
The remainder is 6 after subtracting 294 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 10:
42 goes into 60 1 times with a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 7297.3571
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 11:
42 goes into 180 4 times with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 7297.35714
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 12:
If we divide 120 by 42, we get 2 and a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 7297.357142
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 13:
360 divided by 42 is 8 with a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 7297.3571428
If we subtract 336 from 360, we 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.

Advancing to step 14:
42 can be fit into 240 5 times, resulting in a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 7297.35714285
Subtracting 210 from 240 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 7297.35714285, with a leftover of 3e-08.