We're dividing 645986 by 78 
Let's see how many times 78 fits into 645986.

Let's proceed to step 1:
When dividing 6 by 78, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 78

Moving on to step 2:
64 divided by 78 is 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Append the next digit (5) from the dividend to 64 and continue with: 645 / 78

Moving on to step 3:
645 divided by 78 is 8 with a remainder of 21.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 624 away from 645, we end up with 21.
Fetch the next digit (9) from the dividend, attach it to 21 and continue: 219 / 78

Advancing to step 4:
The number 78 fits into 219 2 times, leaving a remainder of 63.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
If we take 156 away from 219, we end up with 63.
Take the next digit (8) from the dividend and append it to 63, then repeat: 638 / 78

Let's proceed to step 5:
638 divided by 78 is 8 with a remainder of 14.
Record the quotient 8 as the next digit in the result. 
Result so far: 828.0
Subtracting 624 from 638 leaves us with 14.
Grab the next digit (6) from the dividend, add it to 14, then carry on: 146 / 78

Going ahead to step 6:
The number 78 fits into 146 1 times, leaving a remainder of 68.
Record the quotient 1 as the next digit in the result. 
Result so far: 8281.0
Deduct 78 from 146 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 7:
The number 78 fits into 680 8 times, leaving a remainder of 56.
Use 8 as the next digit of our solution. 
Result so far: 8281.8
The remainder is 56 after subtracting 624 from 680.
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:
78 goes into 560 7 times with a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 8281.87
If we subtract 546 from 560, we 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.

Moving on to step 9:
78 goes into 140 1 times with a remainder of 62.
The next digit of our result is 1. 
Result so far: 8281.871
If we subtract 78 from 140, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 10:
78 goes into 620 7 times with a remainder of 74.
Record the quotient 7 as the next digit in the result. 
Result so far: 8281.8717
Deduct 546 from 620 and we're left 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.

Let's proceed to step 11:
If we divide 740 by 78, we get 9 and a remainder of 38.
The next digit of our result is 9. 
Result so far: 8281.87179
Subtracting 702 from 740 leaves us 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.

Going ahead to step 12:
380 divided by 78 is 4 with a remainder of 68.
Use 4 as the next digit of our solution. 
Result so far: 8281.871794
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.

Step 13:
The number 78 fits into 680 8 times, leaving a remainder of 56.
Put 8 as the next digit of the answer. 
Result so far: 8281.8717948
If we take 624 away from 680, we end up 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.

On to step 14:
The number 78 fits into 560 7 times, leaving a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 8281.87179487
If we subtract 546 from 560, we 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.

The final outcome is 8281.87179487, with a leftover of 1.4e-08.