305689 ÷ 78 
Let's see how many times 78 fits into 305689.

Let's proceed to step 1:
If we divide 3 by 78, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 78

Going ahead to step 2:
78 goes into 30 0 times with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Fetch the next digit (5) from the dividend, attach it to 30 and continue: 305 / 78

Going ahead to step 3:
305 divided by 78 is 3 with a remainder of 71.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 234 from 305 and we're left with 71.
Fetch the next digit (6) from the dividend, attach it to 71 and continue: 716 / 78

Moving on to step 4:
716 divided by 78 is 9 with a remainder of 14.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Deduct 702 from 716 and we're left with 14.
Fetch the next digit (8) from the dividend, attach it to 14 and continue: 148 / 78

Step 5:
78 can be fit into 148 1 times, resulting in a remainder of 70.
Use 1 as the next digit of our solution. 
Result so far: 391.0
Deduct 78 from 148 and we're left with 70.
Bring next digit (9) of the dividend behind the 70 and repeat the process: 709 / 78

On to step 6:
78 goes into 709 9 times with a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 3919.0
The remainder is 7 after subtracting 702 from 709.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
78 can be fit into 70 0 times, resulting in a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 3919.0
Deduct 0 from 70 and we're left 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.

Step 8:
When dividing 700 by 78, we get 8 with a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 3919.08
Subtract 624 from 700 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.

Going ahead to step 9:
The number 78 fits into 760 9 times, leaving a remainder of 58.
The number 9 becomes the next digit in our result. 
Result so far: 3919.089
Deduct 702 from 760 and we're left 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.

Step 10:
78 can be fit into 580 7 times, resulting in a remainder of 34.
Write down 7 as next digit of the result. 
Result so far: 3919.0897
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.

Let's proceed to step 11:
When dividing 340 by 78, we get 4 with a remainder of 28.
The next digit of our result is 4. 
Result so far: 3919.08974
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.

Let's proceed to step 12:
The number 78 fits into 280 3 times, leaving a remainder of 46.
Write down 3 as next digit of the result. 
Result so far: 3919.089743
Subtract 234 from 280 to 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.

On to step 13:
If we divide 460 by 78, we get 5 and a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 3919.0897435
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.

Step 14:
The number 78 fits into 700 8 times, leaving a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 3919.08974358
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.

The final result is 3919.08974358 with a remainder of 7.6e-08.