817821 divided by 78 
Our goal is to divide 817821 by 78.

Step 1:
8 divided by 78 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 78

Moving on to step 2:
The number 78 fits into 81 1 times, leaving a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 3 after subtracting 78 from 81.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 78

Advancing to step 3:
The number 78 fits into 37 0 times, leaving a remainder of 37.
Use 0 as the next digit of our solution. 
Result so far: 10.0
The remainder is 37 after subtracting 0 from 37.
Include the next digit (8) from the dividend after 37, then repeat: 378 / 78

Going ahead to step 4:
The number 78 fits into 378 4 times, leaving a remainder of 66.
The next digit of our result is 4. 
Result so far: 104.0
If we subtract 312 from 378, we get 66.
Take the next digit (2) from the dividend and append it to 66, then repeat: 662 / 78

Going ahead to step 5:
The number 78 fits into 662 8 times, leaving a remainder of 38.
The next digit of our result is 8. 
Result so far: 1048.0
Subtract 624 from 662 to get 38.
Grab the next digit (1) from the dividend, add it to 38, then carry on: 381 / 78

On to step 6:
If we divide 381 by 78, we get 4 and a remainder of 69.
Use 4 as the next digit of our solution. 
Result so far: 10484.0
If we subtract 312 from 381, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

On to step 7:
78 can be fit into 690 8 times, resulting in a remainder of 66.
Put 8 as the next digit of the answer. 
Result so far: 10484.8
If we subtract 624 from 690, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 8:
If we divide 660 by 78, we get 8 and a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 10484.88
Subtract 624 from 660 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The quotient of the division is 10484.88, and the remainder is 0.036.