We're dividing 31102807 by 780 
We want to figure out the number of times 31102807 can be divided by 780.

Advancing to step 1:
3 divided by 780 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 780

Step 2:
780 can be fit into 31 0 times, resulting in a remainder of 31.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Bring next digit (1) of the dividend behind the 31 and repeat the process: 311 / 780

Going ahead to step 3:
The number 780 fits into 311 0 times, leaving a remainder of 311.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 311 leaves us with 311.
Fetch the next digit (0) from the dividend, attach it to 311 and continue: 3110 / 780

Going ahead to step 4:
The number 780 fits into 3110 3 times, leaving a remainder of 770.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 770 after subtracting 2340 from 3110.
Bring next digit (2) of the dividend behind the 770 and repeat the process: 7702 / 780

Let's proceed to step 5:
When dividing 7702 by 780, we get 9 with a remainder of 682.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
Subtract 7020 from 7702 to get 682.
Include the next digit (8) from the dividend after 682, then repeat: 6828 / 780

Let's proceed to step 6:
The number 780 fits into 6828 8 times, leaving a remainder of 588.
Put 8 as the next digit of the answer. 
Result so far: 398.0
The remainder is 588 after subtracting 6240 from 6828.
Take the next digit (0) from the dividend and append it to 588, then repeat: 5880 / 780

On to step 7:
780 goes into 5880 7 times with a remainder of 420.
Record the quotient 7 as the next digit in the result. 
Result so far: 3987.0
Subtracting 5460 from 5880 leaves us with 420.
Fetch the next digit (7) from the dividend, attach it to 420 and continue: 4207 / 780

Step 8:
If we divide 4207 by 780, we get 5 and a remainder of 307.
Put 5 as the next digit of the answer. 
Result so far: 39875.0
If we take 3900 away from 4207, we end up with 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

On to step 9:
780 goes into 3070 3 times with a remainder of 730.
The next digit of our result is 3. 
Result so far: 39875.3
Deduct 2340 from 3070 and we're left with 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7300, and continue the process.

Moving on to step 10:
780 can be fit into 7300 9 times, resulting in a remainder of 280.
Write down 9 as next digit of the result. 
Result so far: 39875.39
If we take 7020 away from 7300, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 11:
780 can be fit into 2800 3 times, resulting in a remainder of 460.
Put 3 as the next digit of the answer. 
Result so far: 39875.393
The remainder is 460 after subtracting 2340 from 2800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Step 12:
780 can be fit into 4600 5 times, resulting in a remainder of 700.
The number 5 becomes the next digit in our result. 
Result so far: 39875.3935
Subtract 3900 from 4600 to get 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Going ahead to step 13:
780 can be fit into 7000 8 times, resulting in a remainder of 760.
The number 8 becomes the next digit in our result. 
Result so far: 39875.39358
If we take 6240 away from 7000, we end up with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

On to step 14:
If we divide 7600 by 780, we get 9 and a remainder of 580.
The next digit of our result is 9. 
Result so far: 39875.393589
The remainder is 580 after subtracting 7020 from 7600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Advancing to step 15:
780 goes into 5800 7 times with a remainder of 340.
Put 7 as the next digit of the answer. 
Result so far: 39875.3935897
The remainder is 340 after subtracting 5460 from 5800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 16:
When dividing 3400 by 780, we get 4 with a remainder of 280.
Use 4 as the next digit of our solution. 
Result so far: 39875.39358974
Subtract 3120 from 3400 to get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

The final result is 39875.39358974 with a remainder of 2.8e-07.