We're dividing 9909665 by 780 
We want to figure out the number of times 9909665 can be divided by 780.

On to step 1:
9 divided by 780 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 780

Let's proceed to step 2:
780 goes into 99 0 times with a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Grab the next digit (0) from the dividend, add it to 99, then carry on: 990 / 780

Let's proceed to step 3:
If we divide 990 by 780, we get 1 and a remainder of 210.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 780 from 990 to get 210.
Fetch the next digit (9) from the dividend, attach it to 210 and continue: 2109 / 780

On to step 4:
When dividing 2109 by 780, we get 2 with a remainder of 549.
The next digit of our result is 2. 
Result so far: 12.0
If we subtract 1560 from 2109, we get 549.
Include the next digit (6) from the dividend after 549, then repeat: 5496 / 780

On to step 5:
5496 divided by 780 is 7 with a remainder of 36.
Write down 7 as next digit of the result. 
Result so far: 127.0
Subtract 5460 from 5496 to get 36.
Append the next digit (6) from the dividend to 36 and continue with: 366 / 780

Moving on to step 6:
The number 780 fits into 366 0 times, leaving a remainder of 366.
Use 0 as the next digit of our solution. 
Result so far: 1270.0
If we subtract 0 from 366, we get 366.
Append the next digit (5) from the dividend to 366 and continue with: 3665 / 780

Moving on to step 7:
3665 divided by 780 is 4 with a remainder of 545.
Put 4 as the next digit of the answer. 
Result so far: 12704.0
Deduct 3120 from 3665 and we're left with 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Moving on to step 8:
5450 divided by 780 is 6 with a remainder of 770.
Record the quotient 6 as the next digit in the result. 
Result so far: 12704.6
Subtract 4680 from 5450 to get 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

Step 9:
7700 divided by 780 is 9 with a remainder of 680.
Put 9 as the next digit of the answer. 
Result so far: 12704.69
Subtract 7020 from 7700 to get 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Step 10:
When dividing 6800 by 780, we get 8 with a remainder of 560.
Record the quotient 8 as the next digit in the result. 
Result so far: 12704.698
Subtract 6240 from 6800 to get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

On to step 11:
780 goes into 5600 7 times with a remainder of 140.
Write down 7 as next digit of the result. 
Result so far: 12704.6987
The remainder is 140 after subtracting 5460 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 12:
1400 divided by 780 is 1 with a remainder of 620.
Record the quotient 1 as the next digit in the result. 
Result so far: 12704.69871
Deduct 780 from 1400 and we're left with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Moving on to step 13:
780 can be fit into 6200 7 times, resulting in a remainder of 740.
The next digit of our result is 7. 
Result so far: 12704.698717
Subtract 5460 from 6200 to get 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7400, and continue the process.

Advancing to step 14:
780 can be fit into 7400 9 times, resulting in a remainder of 380.
Put 9 as the next digit of the answer. 
Result so far: 12704.6987179
Subtracting 7020 from 7400 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Step 15:
If we divide 3800 by 780, we get 4 and a remainder of 680.
Put 4 as the next digit of the answer. 
Result so far: 12704.69871794
Subtract 3120 from 3800 to get 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Our division results in 12704.69871794 with a remaining 6.8e-07.