390770 ÷ 78 
Let's see how many times 78 fits into 390770.

Advancing to step 1:
When dividing 3 by 78, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 78

Advancing to step 2:
78 can be fit into 39 0 times, resulting in a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Fetch the next digit (0) from the dividend, attach it to 39 and continue: 390 / 78

On to step 3:
390 divided by 78 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 390 from 390 and we're left with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 78

Step 4:
78 goes into 7 0 times with a remainder of 7.
The next digit of our result is 0. 
Result so far: 50.0
If we take 0 away from 7, we end up with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 78

Step 5:
78 goes into 77 0 times with a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 500.0
Subtract 0 from 77 to get 77.
Grab the next digit (0) from the dividend, add it to 77, then carry on: 770 / 78

Advancing to step 6:
The number 78 fits into 770 9 times, leaving a remainder of 68.
Write down 9 as next digit of the result. 
Result so far: 5009.0
Subtract 702 from 770 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.

Let's proceed to step 7:
When dividing 680 by 78, we get 8 with a remainder of 56.
The number 8 becomes the next digit in our result. 
Result so far: 5009.8
Subtract 624 from 680 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.

Let's proceed to step 8:
If we divide 560 by 78, we get 7 and a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 5009.87
Subtracting 546 from 560 leaves us 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.

Step 9:
78 can be fit into 140 1 times, resulting in a remainder of 62.
Record the quotient 1 as the next digit in the result. 
Result so far: 5009.871
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.

Moving on to step 10:
78 goes into 620 7 times with a remainder of 74.
Use 7 as the next digit of our solution. 
Result so far: 5009.8717
If we subtract 546 from 620, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 11:
78 can be fit into 740 9 times, resulting in a remainder of 38.
Record the quotient 9 as the next digit in the result. 
Result so far: 5009.87179
If we subtract 702 from 740, we 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.

Going ahead to step 12:
78 can be fit into 380 4 times, resulting in a remainder of 68.
The next digit of our result is 4. 
Result so far: 5009.871794
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 13:
When dividing 680 by 78, we get 8 with a remainder of 56.
The next digit of our result is 8. 
Result so far: 5009.8717948
Deduct 624 from 680 and we're left 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 14:
When dividing 560 by 78, we get 7 with a remainder of 14.
The number 7 becomes the next digit in our result. 
Result so far: 5009.87179487
Subtract 546 from 560 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 5009.87179487 with a balance of 1.4e-08.