399235 divided by 78 
Our goal is to divide 399235 by 78.

On to step 1:
If we divide 3 by 78, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 78

Going ahead to step 2:
78 goes into 39 0 times with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Bring next digit (9) of the dividend behind the 39 and repeat the process: 399 / 78

Advancing to step 3:
The number 78 fits into 399 5 times, leaving a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Deduct 390 from 399 and we're left with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 78

Step 4:
78 can be fit into 92 1 times, resulting in a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 51.0
Subtracting 78 from 92 leaves us with 14.
Bring next digit (3) of the dividend behind the 14 and repeat the process: 143 / 78

Going ahead to step 5:
When dividing 143 by 78, we get 1 with a remainder of 65.
The next digit of our result is 1. 
Result so far: 511.0
Subtract 78 from 143 to get 65.
Fetch the next digit (5) from the dividend, attach it to 65 and continue: 655 / 78

Moving on to step 6:
78 goes into 655 8 times with a remainder of 31.
Use 8 as the next digit of our solution. 
Result so far: 5118.0
If we take 624 away from 655, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 7:
310 divided by 78 is 3 with a remainder of 76.
Record the quotient 3 as the next digit in the result. 
Result so far: 5118.3
Subtract 234 from 310 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 8:
78 goes into 760 9 times with a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 5118.39
The remainder is 58 after subtracting 702 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 9:
78 can be fit into 580 7 times, resulting in a remainder of 34.
Use 7 as the next digit of our solution. 
Result so far: 5118.397
Deduct 546 from 580 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 10:
When dividing 340 by 78, we get 4 with a remainder of 28.
Write down 4 as next digit of the result. 
Result so far: 5118.3974
If we take 312 away from 340, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 11:
78 can be fit into 280 3 times, resulting in a remainder of 46.
Record the quotient 3 as the next digit in the result. 
Result so far: 5118.39743
If we take 234 away from 280, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 12:
460 divided by 78 is 5 with a remainder of 70.
The next digit of our result is 5. 
Result so far: 5118.397435
Subtracting 390 from 460 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 13:
700 divided by 78 is 8 with a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 5118.3974358
If we subtract 624 from 700, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 14:
78 can be fit into 760 9 times, resulting in a remainder of 58.
The next digit of our result is 9. 
Result so far: 5118.39743589
The remainder is 58 after subtracting 702 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

In conclusion, the division gives 5118.39743589 with a balance of 5.8e-08.