840978 divided by 86 
We want to divide 840978 by 86.

Let's proceed to step 1:
The number 86 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 86

Going ahead to step 2:
86 goes into 84 0 times with a remainder of 84.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 84 to get 84.
Include the next digit (0) from the dividend after 84, then repeat: 840 / 86

Let's proceed to step 3:
The number 86 fits into 840 9 times, leaving a remainder of 66.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 774 from 840 and we're left with 66.
Take the next digit (9) from the dividend and append it to 66, then repeat: 669 / 86

Step 4:
86 can be fit into 669 7 times, resulting in a remainder of 67.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Deduct 602 from 669 and we're left with 67.
Append the next digit (7) from the dividend to 67 and continue with: 677 / 86

Step 5:
86 goes into 677 7 times with a remainder of 75.
Record the quotient 7 as the next digit in the result. 
Result so far: 977.0
The remainder is 75 after subtracting 602 from 677.
Take the next digit (8) from the dividend and append it to 75, then repeat: 758 / 86

On to step 6:
The number 86 fits into 758 8 times, leaving a remainder of 70.
Use 8 as the next digit of our solution. 
Result so far: 9778.0
Deduct 688 from 758 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 7:
When dividing 700 by 86, we get 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 9778.8
Deduct 688 from 700 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
120 divided by 86 is 1 with a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 9778.81
If we subtract 86 from 120, we 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.

Moving on to step 9:
340 divided by 86 is 3 with a remainder of 82.
Put 3 as the next digit of the answer. 
Result so far: 9778.813
The remainder is 82 after subtracting 258 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 10:
The number 86 fits into 820 9 times, leaving a remainder of 46.
Record the quotient 9 as the next digit in the result. 
Result so far: 9778.8139
If we take 774 away from 820, 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 11:
If we divide 460 by 86, we get 5 and a remainder of 30.
The next digit of our result is 5. 
Result so far: 9778.81395
Subtracting 430 from 460 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 12:
300 divided by 86 is 3 with a remainder of 42.
The next digit of our result is 3. 
Result so far: 9778.813953
The remainder is 42 after subtracting 258 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 13:
When dividing 420 by 86, we get 4 with a remainder of 76.
Write down 4 as next digit of the result. 
Result so far: 9778.8139534
If we subtract 344 from 420, 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.

On to step 14:
86 can be fit into 760 8 times, resulting in a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 9778.81395348
Deduct 688 from 760 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The final outcome is 9778.81395348, with a leftover of 7.2e-08.