Let's divide 258303 by 42
We're looking to find how many times 42 goes into 258303.

Going ahead to step 1:
2 divided by 42 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 42

Going ahead to step 2:
25 divided by 42 is 0 with a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Grab the next digit (8) from the dividend, add it to 25, then carry on: 258 / 42

Going ahead to step 3:
The number 42 fits into 258 6 times, leaving a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtracting 252 from 258 leaves us with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 42

Advancing to step 4:
The number 42 fits into 63 1 times, leaving a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 61.0
If we take 42 away from 63, we end up with 21.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 42

Moving on to step 5:
42 can be fit into 210 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 615.0
Subtract 210 from 210 to get 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 42

Step 6:
42 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 6150.0
Subtracting 0 from 3 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
When dividing 30 by 42, we get 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 6150.0
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 8:
300 divided by 42 is 7 with a remainder of 6.
The next digit of our result is 7. 
Result so far: 6150.07
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.

Let's proceed to step 9:
42 can be fit into 60 1 times, resulting in a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 6150.071
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 10:
180 divided by 42 is 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 6150.0714
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 11:
42 goes into 120 2 times with a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 6150.07142
Deduct 84 from 120 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 12:
360 divided by 42 is 8 with a remainder of 24.
Write down 8 as next digit of the result. 
Result so far: 6150.071428
Subtracting 336 from 360 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.

Going ahead to step 13:
42 goes into 240 5 times with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 6150.0714285
Subtract 210 from 240 to get 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 14:
42 goes into 300 7 times with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 6150.07142857
Deduct 294 from 300 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Our division results in 6150.07142857 with a remaining 6e-09.