Let's divide 602830 by 78
We're looking to find how many times 78 goes into 602830.

Going ahead to step 1:
78 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 78

Moving on to step 2:
78 can be fit into 60 0 times, resulting in a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 60 and we're left with 60.
Grab the next digit (2) from the dividend, add it to 60, then carry on: 602 / 78

Going ahead to step 3:
When dividing 602 by 78, we get 7 with a remainder of 56.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we subtract 546 from 602, we get 56.
Append the next digit (8) from the dividend to 56 and continue with: 568 / 78

On to step 4:
The number 78 fits into 568 7 times, leaving a remainder of 22.
Write down 7 as next digit of the result. 
Result so far: 77.0
If we subtract 546 from 568, we get 22.
Bring next digit (3) of the dividend behind the 22 and repeat the process: 223 / 78

On to step 5:
223 divided by 78 is 2 with a remainder of 67.
The next digit of our result is 2. 
Result so far: 772.0
Deduct 156 from 223 and we're left with 67.
Append the next digit (0) from the dividend to 67 and continue with: 670 / 78

On to step 6:
670 divided by 78 is 8 with a remainder of 46.
Put 8 as the next digit of the answer. 
Result so far: 7728.0
If we take 624 away from 670, 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.

Going ahead to step 7:
78 goes into 460 5 times with a remainder of 70.
Use 5 as the next digit of our solution. 
Result so far: 7728.5
Subtract 390 from 460 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 8:
78 goes into 700 8 times with a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 7728.58
Deduct 624 from 700 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

On to step 9:
When dividing 760 by 78, we get 9 with a remainder of 58.
The next digit of our result is 9. 
Result so far: 7728.589
Subtracting 702 from 760 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 10:
The number 78 fits into 580 7 times, leaving a remainder of 34.
Use 7 as the next digit of our solution. 
Result so far: 7728.5897
Subtract 546 from 580 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 11:
340 divided by 78 is 4 with a remainder of 28.
Use 4 as the next digit of our solution. 
Result so far: 7728.58974
Subtracting 312 from 340 leaves us 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.

Going ahead to step 12:
78 goes into 280 3 times with a remainder of 46.
Put 3 as the next digit of the answer. 
Result so far: 7728.589743
If we subtract 234 from 280, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 13:
460 divided by 78 is 5 with a remainder of 70.
Use 5 as the next digit of our solution. 
Result so far: 7728.5897435
If we take 390 away from 460, we end up 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.

On to step 14:
78 can be fit into 700 8 times, resulting in a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 7728.58974358
If we take 624 away from 700, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final outcome is 7728.58974358, with a leftover of 7.6e-08.