We're dividing 840721 by 66 
Let's see how many times 66 fits into 840721.

Moving on to step 1:
66 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 66

Moving on to step 2:
66 can be fit into 84 1 times, resulting in a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 66 from 84 leaves us with 18.
Append the next digit (0) from the dividend to 18 and continue with: 180 / 66

Advancing to step 3:
66 can be fit into 180 2 times, resulting in a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we take 132 away from 180, we end up with 48.
Append the next digit (7) from the dividend to 48 and continue with: 487 / 66

Moving on to step 4:
487 divided by 66 is 7 with a remainder of 25.
The next digit of our result is 7. 
Result so far: 127.0
Deduct 462 from 487 and we're left with 25.
Append the next digit (2) from the dividend to 25 and continue with: 252 / 66

Going ahead to step 5:
When dividing 252 by 66, we get 3 with a remainder of 54.
The number 3 becomes the next digit in our result. 
Result so far: 1273.0
If we subtract 198 from 252, we get 54.
Append the next digit (1) from the dividend to 54 and continue with: 541 / 66

On to step 6:
541 divided by 66 is 8 with a remainder of 13.
The next digit of our result is 8. 
Result so far: 12738.0
Subtracting 528 from 541 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 7:
If we divide 130 by 66, we get 1 and a remainder of 64.
The number 1 becomes the next digit in our result. 
Result so far: 12738.1
If we take 66 away from 130, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 8:
When dividing 640 by 66, we get 9 with a remainder of 46.
The next digit of our result is 9. 
Result so far: 12738.19
The remainder is 46 after subtracting 594 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 9:
66 can be fit into 460 6 times, resulting in a remainder of 64.
The next digit of our result is 6. 
Result so far: 12738.196
If we take 396 away from 460, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 10:
640 divided by 66 is 9 with a remainder of 46.
Put 9 as the next digit of the answer. 
Result so far: 12738.1969
The remainder is 46 after subtracting 594 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 11:
460 divided by 66 is 6 with a remainder of 64.
The next digit of our result is 6. 
Result so far: 12738.19696
If we subtract 396 from 460, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 12:
The number 66 fits into 640 9 times, leaving a remainder of 46.
Put 9 as the next digit of the answer. 
Result so far: 12738.196969
If we subtract 594 from 640, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 13:
460 divided by 66 is 6 with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 12738.1969696
If we subtract 396 from 460, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 14:
The number 66 fits into 640 9 times, leaving a remainder of 46.
Put 9 as the next digit of the answer. 
Result so far: 12738.19696969
If we subtract 594 from 640, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Our division results in 12738.19696969 with a remaining 4.6e-08.