Let's divide 639755 by 78
We're looking to find how many times 78 goes into 639755.

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
Subtracting 0 from 6 leaves us with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 78

Let's proceed to step 2:
78 can be fit into 63 0 times, resulting in a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 78

Step 3:
78 goes into 639 8 times with a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we subtract 624 from 639, we get 15.
Include the next digit (7) from the dividend after 15, then repeat: 157 / 78

Let's proceed to step 4:
The number 78 fits into 157 2 times, leaving a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
If we subtract 156 from 157, we get 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 78

Let's proceed to step 5:
When dividing 15 by 78, we get 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 820.0
The remainder is 15 after subtracting 0 from 15.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 78

Let's proceed to step 6:
When dividing 155 by 78, we get 1 with a remainder of 77.
The next digit of our result is 1. 
Result so far: 8201.0
If we subtract 78 from 155, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 7:
78 can be fit into 770 9 times, resulting in a remainder of 68.
Use 9 as the next digit of our solution. 
Result so far: 8201.9
If we subtract 702 from 770, 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.

Let's proceed to step 8:
680 divided by 78 is 8 with a remainder of 56.
Record the quotient 8 as the next digit in the result. 
Result so far: 8201.98
If we subtract 624 from 680, we 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.

Advancing to step 9:
When dividing 560 by 78, we get 7 with a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 8201.987
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.

Advancing to step 10:
78 goes into 140 1 times with a remainder of 62.
Use 1 as the next digit of our solution. 
Result so far: 8201.9871
The remainder is 62 after subtracting 78 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 11:
The number 78 fits into 620 7 times, leaving a remainder of 74.
Use 7 as the next digit of our solution. 
Result so far: 8201.98717
Subtract 546 from 620 to 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.

Moving on to step 12:
740 divided by 78 is 9 with a remainder of 38.
Write down 9 as next digit of the result. 
Result so far: 8201.987179
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 13:
380 divided by 78 is 4 with a remainder of 68.
Record the quotient 4 as the next digit in the result. 
Result so far: 8201.9871794
The remainder is 68 after subtracting 312 from 380.
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 14:
78 can be fit into 680 8 times, resulting in a remainder of 56.
Write down 8 as next digit of the result. 
Result so far: 8201.98717948
Subtracting 624 from 680 leaves us 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.

After the division, we end up with 8201.98717948 and a remainder of 5.6e-08.