644070 ÷ 78 
Let's see how many times 78 fits into 644070.

Let's proceed to step 1:
If we divide 6 by 78, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 78

Let's proceed to step 2:
78 goes into 64 0 times with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Include the next digit (4) from the dividend after 64, then repeat: 644 / 78

Moving on to step 3:
78 can be fit into 644 8 times, resulting in a remainder of 20.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 624 from 644 to get 20.
Bring next digit (0) of the dividend behind the 20 and repeat the process: 200 / 78

Advancing to step 4:
The number 78 fits into 200 2 times, leaving a remainder of 44.
The next digit of our result is 2. 
Result so far: 82.0
The remainder is 44 after subtracting 156 from 200.
Include the next digit (7) from the dividend after 44, then repeat: 447 / 78

Step 5:
When dividing 447 by 78, we get 5 with a remainder of 57.
Write down 5 as next digit of the result. 
Result so far: 825.0
Subtract 390 from 447 to get 57.
Bring next digit (0) of the dividend behind the 57 and repeat the process: 570 / 78

Let's proceed to step 6:
78 goes into 570 7 times with a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 8257.0
The remainder is 24 after subtracting 546 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 7:
240 divided by 78 is 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 8257.3
Deduct 234 from 240 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
If we divide 60 by 78, we get 0 and a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 8257.3
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
78 can be fit into 600 7 times, resulting in a remainder of 54.
Record the quotient 7 as the next digit in the result. 
Result so far: 8257.307
Subtracting 546 from 600 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 10:
When dividing 540 by 78, we get 6 with a remainder of 72.
Use 6 as the next digit of our solution. 
Result so far: 8257.3076
Deduct 468 from 540 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.

Step 11:
When dividing 720 by 78, we get 9 with a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 8257.30769
Deduct 702 from 720 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 12:
When dividing 180 by 78, we get 2 with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 8257.307692
The remainder is 24 after subtracting 156 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 13:
The number 78 fits into 240 3 times, leaving a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 8257.3076923
Subtracting 234 from 240 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 14:
The number 78 fits into 60 0 times, leaving a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 8257.3076923
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Our division results in 8257.3076923 with a remaining 6e-08.