We're dividing 423575 by 78 
We're looking to find how many times 78 goes into 423575.

Advancing to step 1:
4 divided by 78 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 78

On to step 2:
78 can be fit into 42 0 times, resulting in a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (3) from the dividend and append it to 42, then repeat: 423 / 78

Step 3:
423 divided by 78 is 5 with a remainder of 33.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 390 from 423 and we're left with 33.
Bring next digit (5) of the dividend behind the 33 and repeat the process: 335 / 78

Advancing to step 4:
78 goes into 335 4 times with a remainder of 23.
Write down 4 as next digit of the result. 
Result so far: 54.0
Deduct 312 from 335 and we're left with 23.
Bring next digit (7) of the dividend behind the 23 and repeat the process: 237 / 78

Let's proceed to step 5:
When dividing 237 by 78, we get 3 with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 543.0
Subtracting 234 from 237 leaves us with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 78

Going ahead to step 6:
35 divided by 78 is 0 with a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 5430.0
Subtract 0 from 35 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 7:
If we divide 350 by 78, we get 4 and a remainder of 38.
Record the quotient 4 as the next digit in the result. 
Result so far: 5430.4
Subtract 312 from 350 to 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.

Moving on to step 8:
When dividing 380 by 78, we get 4 with a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 5430.44
Subtract 312 from 380 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

After the division, we end up with 5430.44 and a remainder of 0.068.