15681817 ÷ 780 
Let's see how many times 780 fits into 15681817.

On to step 1:
1 divided by 780 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 780

Moving on to step 2:
780 goes into 15 0 times with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Append the next digit (6) from the dividend to 15 and continue with: 156 / 780

On to step 3:
156 divided by 780 is 0 with a remainder of 156.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 156 leaves us with 156.
Grab the next digit (8) from the dividend, add it to 156, then carry on: 1568 / 780

Step 4:
If we divide 1568 by 780, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 8 after subtracting 1560 from 1568.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 780

Step 5:
780 can be fit into 81 0 times, resulting in a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 20.0
Deduct 0 from 81 and we're left with 81.
Take the next digit (8) from the dividend and append it to 81, then repeat: 818 / 780

Going ahead to step 6:
818 divided by 780 is 1 with a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 201.0
Deduct 780 from 818 and we're left with 38.
Fetch the next digit (1) from the dividend, attach it to 38 and continue: 381 / 780

Going ahead to step 7:
When dividing 381 by 780, we get 0 with a remainder of 381.
Use 0 as the next digit of our solution. 
Result so far: 2010.0
If we subtract 0 from 381, we get 381.
Append the next digit (7) from the dividend to 381 and continue with: 3817 / 780

On to step 8:
3817 divided by 780 is 4 with a remainder of 697.
Use 4 as the next digit of our solution. 
Result so far: 20104.0
If we take 3120 away from 3817, we end up with 697.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6970, and continue the process.

Step 9:
6970 divided by 780 is 8 with a remainder of 730.
Put 8 as the next digit of the answer. 
Result so far: 20104.8
Subtract 6240 from 6970 to get 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7300, and continue the process.

Step 10:
If we divide 7300 by 780, we get 9 and a remainder of 280.
Put 9 as the next digit of the answer. 
Result so far: 20104.89
Subtract 7020 from 7300 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.

On to step 11:
2800 divided by 780 is 3 with a remainder of 460.
Use 3 as the next digit of our solution. 
Result so far: 20104.893
Subtracting 2340 from 2800 leaves us with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Going ahead to step 12:
780 can be fit into 4600 5 times, resulting in a remainder of 700.
Use 5 as the next digit of our solution. 
Result so far: 20104.8935
Deduct 3900 from 4600 and we're left with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Moving on to step 13:
If we divide 7000 by 780, we get 8 and a remainder of 760.
Record the quotient 8 as the next digit in the result. 
Result so far: 20104.89358
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.

Let's proceed to step 14:
780 can be fit into 7600 9 times, resulting in a remainder of 580.
Write down 9 as next digit of the result. 
Result so far: 20104.893589
If we take 7020 away from 7600, we end up with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

On to step 15:
When dividing 5800 by 780, we get 7 with a remainder of 340.
The next digit of our result is 7. 
Result so far: 20104.8935897
Deduct 5460 from 5800 and we're left with 340.
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:
780 can be fit into 3400 4 times, resulting in a remainder of 280.
The next digit of our result is 4. 
Result so far: 20104.89358974
If we subtract 3120 from 3400, we 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 quotient of the division is 20104.89358974, and the remainder is 2.8e-07.