We look at the division of 305866 by 42 
Let's see how many times 42 fits into 305866.

On to step 1:
If we divide 3 by 42, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 42

Advancing to step 2:
30 divided by 42 is 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 30 to get 30.
Append the next digit (5) from the dividend to 30 and continue with: 305 / 42

Advancing to step 3:
If we divide 305 by 42, we get 7 and a remainder of 11.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 294 from 305 leaves us with 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 42

Moving on to step 4:
118 divided by 42 is 2 with a remainder of 34.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
Subtracting 84 from 118 leaves us with 34.
Take the next digit (6) from the dividend and append it to 34, then repeat: 346 / 42

Advancing to step 5:
42 can be fit into 346 8 times, resulting in a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 728.0
Subtract 336 from 346 to get 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 42

On to step 6:
106 divided by 42 is 2 with a remainder of 22.
Record the quotient 2 as the next digit in the result. 
Result so far: 7282.0
Deduct 84 from 106 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 7:
42 goes into 220 5 times with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 7282.5
Subtracting 210 from 220 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
The number 42 fits into 100 2 times, leaving a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 7282.52
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
42 goes into 160 3 times with a remainder of 34.
The number 3 becomes the next digit in our result. 
Result so far: 7282.523
The remainder is 34 after subtracting 126 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 10:
The number 42 fits into 340 8 times, leaving a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 7282.5238
Subtracting 336 from 340 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 11:
When dividing 40 by 42, we get 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 7282.5238
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 12:
The number 42 fits into 400 9 times, leaving a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 7282.523809
Subtract 378 from 400 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 13:
220 divided by 42 is 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 7282.5238095
If we take 210 away from 220, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 14:
42 goes into 100 2 times with a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 7282.52380952
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 7282.52380952 with a remainder of 1.6e-08.