We divide 30917 by 78
Let's see how many times 78 fits into 30917.

On to step 1:
When dividing 3 by 78, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 78

Advancing to step 2:
The number 78 fits into 30 0 times, leaving a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 78

Let's proceed to step 3:
309 divided by 78 is 3 with a remainder of 75.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 75 after subtracting 234 from 309.
Append the next digit (1) from the dividend to 75 and continue with: 751 / 78

On to step 4:
78 can be fit into 751 9 times, resulting in a remainder of 49.
The next digit of our result is 9. 
Result so far: 39.0
If we subtract 702 from 751, we get 49.
Append the next digit (7) from the dividend to 49 and continue with: 497 / 78

Going ahead to step 5:
78 can be fit into 497 6 times, resulting in a remainder of 29.
Write down 6 as next digit of the result. 
Result so far: 396.0
Subtracting 468 from 497 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 6:
The number 78 fits into 290 3 times, leaving a remainder of 56.
The number 3 becomes the next digit in our result. 
Result so far: 396.3
Subtract 234 from 290 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 7:
560 divided by 78 is 7 with a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 396.37
If we take 546 away from 560, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
140 divided by 78 is 1 with a remainder of 62.
Put 1 as the next digit of the answer. 
Result so far: 396.371
Subtracting 78 from 140 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 9:
78 can be fit into 620 7 times, resulting in a remainder of 74.
Put 7 as the next digit of the answer. 
Result so far: 396.3717
Subtracting 546 from 620 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 10:
78 goes into 740 9 times with a remainder of 38.
The next digit of our result is 9. 
Result so far: 396.37179
Deduct 702 from 740 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 11:
380 divided by 78 is 4 with a remainder of 68.
Record the quotient 4 as the next digit in the result. 
Result so far: 396.371794
If we subtract 312 from 380, we 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.

Going ahead to step 12:
If we divide 680 by 78, we get 8 and a remainder of 56.
Put 8 as the next digit of the answer. 
Result so far: 396.3717948
Subtracting 624 from 680 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 13:
If we divide 560 by 78, we get 7 and a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 396.37179487
If we take 546 away from 560, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 396.37179487 with a remainder of 1.4e-08.