405470 ÷ 42 
We want to figure out the number of times 405470 can be divided by 42.

Advancing to step 1:
The number 42 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 42

Moving on to step 2:
The number 42 fits into 40 0 times, leaving a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 40, we end up with 40.
Grab the next digit (5) from the dividend, add it to 40, then carry on: 405 / 42

Step 3:
42 can be fit into 405 9 times, resulting in 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.
Take the next digit (4) from the dividend and append it to 27, then repeat: 274 / 42

On to step 4:
274 divided by 42 is 6 with a remainder of 22.
Put 6 as the next digit of the answer. 
Result so far: 96.0
Subtract 252 from 274 to get 22.
Grab the next digit (7) from the dividend, add it to 22, then carry on: 227 / 42

Moving on to step 5:
42 can be fit into 227 5 times, resulting in a remainder of 17.
Put 5 as the next digit of the answer. 
Result so far: 965.0
If we take 210 away from 227, we end up with 17.
Include the next digit (0) from the dividend after 17, then repeat: 170 / 42

Going ahead to step 6:
If we divide 170 by 42, we get 4 and a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 9654.0
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
The number 42 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 9654.0
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 8:
The number 42 fits into 200 4 times, leaving a remainder of 32.
Put 4 as the next digit of the answer. 
Result so far: 9654.04
If we take 168 away from 200, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 9:
When dividing 320 by 42, we get 7 with a remainder of 26.
Record the quotient 7 as the next digit in the result. 
Result so far: 9654.047
Subtract 294 from 320 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 10:
42 can be fit into 260 6 times, resulting in a remainder of 8.
The next digit of our result is 6. 
Result so far: 9654.0476
Subtract 252 from 260 to 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.

Advancing to step 11:
42 can be fit into 80 1 times, resulting in a remainder of 38.
Use 1 as the next digit of our solution. 
Result so far: 9654.04761
If we subtract 42 from 80, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 12:
380 divided by 42 is 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 9654.047619
Deduct 378 from 380 and we're left 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.

Let's proceed to step 13:
If we divide 20 by 42, we get 0 and a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9654.047619
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 14:
The number 42 fits into 200 4 times, leaving a remainder of 32.
The next digit of our result is 4. 
Result so far: 9654.04761904
Subtracting 168 from 200 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 9654.04761904, with a leftover of 3.2e-08.