Let's divide 423975 by 78
We're looking to find how many times 78 goes into 423975.

Moving on to step 1:
78 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 78

Step 2:
78 goes into 42 0 times with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Bring next digit (3) of the dividend behind the 42 and repeat the process: 423 / 78

Step 3:
78 goes into 423 5 times with a remainder of 33.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtract 390 from 423 to get 33.
Grab the next digit (9) from the dividend, add it to 33, then carry on: 339 / 78

On to step 4:
78 can be fit into 339 4 times, resulting in a remainder of 27.
Put 4 as the next digit of the answer. 
Result so far: 54.0
Subtract 312 from 339 to get 27.
Include the next digit (7) from the dividend after 27, then repeat: 277 / 78

Advancing to step 5:
78 goes into 277 3 times with a remainder of 43.
The number 3 becomes the next digit in our result. 
Result so far: 543.0
Deduct 234 from 277 and we're left with 43.
Append the next digit (5) from the dividend to 43 and continue with: 435 / 78

Going ahead to step 6:
435 divided by 78 is 5 with a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 5435.0
Subtract 390 from 435 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 7:
78 goes into 450 5 times with a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 5435.5
Subtract 390 from 450 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 8:
The number 78 fits into 600 7 times, leaving a remainder of 54.
The number 7 becomes the next digit in our result. 
Result so far: 5435.57
Subtract 546 from 600 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 9:
The number 78 fits into 540 6 times, leaving a remainder of 72.
The next digit of our result is 6. 
Result so far: 5435.576
Deduct 468 from 540 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 10:
78 can be fit into 720 9 times, resulting in a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 5435.5769
Subtracting 702 from 720 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 11:
The number 78 fits into 180 2 times, leaving a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 5435.57692
Subtract 156 from 180 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 12:
If we divide 240 by 78, we get 3 and a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 5435.576923
Subtracting 234 from 240 leaves us 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.

Step 13:
If we divide 60 by 78, we get 0 and a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 5435.576923
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 14:
78 goes into 600 7 times with a remainder of 54.
Record the quotient 7 as the next digit in the result. 
Result so far: 5435.57692307
Deduct 546 from 600 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Our division results in 5435.57692307 with a remaining 5.4e-08.