405146 divided by 42 
Our goal is to divide 405146 by 42.

Step 1:
The number 42 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 42

Moving on to step 2:
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: 0.0
The remainder is 40 after subtracting 0 from 40.
Append the next digit (5) from the dividend to 40 and continue with: 405 / 42

Let's proceed to step 3:
405 divided by 42 is 9 with a remainder of 27.
The next digit of our result is 9. 
Result so far: 9.0
If we take 378 away from 405, we end up with 27.
Include the next digit (1) from the dividend after 27, then repeat: 271 / 42

On to step 4:
If we divide 271 by 42, we get 6 and a remainder of 19.
Put 6 as the next digit of the answer. 
Result so far: 96.0
If we take 252 away from 271, we end up with 19.
Append the next digit (4) from the dividend to 19 and continue with: 194 / 42

Moving on to step 5:
42 goes into 194 4 times with a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 964.0
Deduct 168 from 194 and we're left with 26.
Append the next digit (6) from the dividend to 26 and continue with: 266 / 42

Let's proceed to step 6:
42 goes into 266 6 times with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 9646.0
Subtract 252 from 266 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 7:
42 goes into 140 3 times with a remainder of 14.
The next digit of our result is 3. 
Result so far: 9646.3
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 8:
140 divided by 42 is 3 with a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 9646.33
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Our division results in 9646.33 with a remaining 0.014.