We look at the division of 661730 by 78 
We want to divide 661730 by 78.

Step 1:
6 divided by 78 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 78

Going ahead to step 2:
78 goes into 66 0 times with a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Fetch the next digit (1) from the dividend, attach it to 66 and continue: 661 / 78

Advancing to step 3:
78 goes into 661 8 times with a remainder of 37.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 624 from 661, we get 37.
Fetch the next digit (7) from the dividend, attach it to 37 and continue: 377 / 78

Advancing to step 4:
When dividing 377 by 78, we get 4 with a remainder of 65.
Use 4 as the next digit of our solution. 
Result so far: 84.0
Subtracting 312 from 377 leaves us with 65.
Grab the next digit (3) from the dividend, add it to 65, then carry on: 653 / 78

Step 5:
When dividing 653 by 78, we get 8 with a remainder of 29.
Write down 8 as next digit of the result. 
Result so far: 848.0
Subtracting 624 from 653 leaves us with 29.
Fetch the next digit (0) from the dividend, attach it to 29 and continue: 290 / 78

Advancing to step 6:
The number 78 fits into 290 3 times, leaving a remainder of 56.
Record the quotient 3 as the next digit in the result. 
Result so far: 8483.0
The remainder is 56 after subtracting 234 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 7:
When dividing 560 by 78, we get 7 with a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 8483.7
If we take 546 away from 560, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 8:
If we divide 140 by 78, we get 1 and a remainder of 62.
Record the quotient 1 as the next digit in the result. 
Result so far: 8483.71
If we take 78 away from 140, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 9:
78 can be fit into 620 7 times, resulting in a remainder of 74.
Write down 7 as next digit of the result. 
Result so far: 8483.717
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 10:
The number 78 fits into 740 9 times, leaving a remainder of 38.
Record the quotient 9 as the next digit in the result. 
Result so far: 8483.7179
If we take 702 away from 740, we end up 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.

On to step 11:
If we divide 380 by 78, we get 4 and a remainder of 68.
Record the quotient 4 as the next digit in the result. 
Result so far: 8483.71794
Deduct 312 from 380 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 12:
78 goes into 680 8 times with a remainder of 56.
Write down 8 as next digit of the result. 
Result so far: 8483.717948
Deduct 624 from 680 and we're left 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 13:
When dividing 560 by 78, we get 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 8483.7179487
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.

Let's proceed to step 14:
If we divide 140 by 78, we get 1 and a remainder of 62.
Write down 1 as next digit of the result. 
Result so far: 8483.71794871
Deduct 78 from 140 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

In conclusion, the division gives 8483.71794871 with a balance of 6.2e-08.