We're dividing 66440680 by 851 
We want to figure out the number of times 66440680 can be divided by 851.

Moving on to step 1:
The number 851 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 851

Moving on to step 2:
851 goes into 66 0 times with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Fetch the next digit (4) from the dividend, attach it to 66 and continue: 664 / 851

Moving on to step 3:
851 goes into 664 0 times with a remainder of 664.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 664 leaves us with 664.
Include the next digit (4) from the dividend after 664, then repeat: 6644 / 851

Let's proceed to step 4:
The number 851 fits into 6644 7 times, leaving a remainder of 687.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 5957 away from 6644, we end up with 687.
Bring next digit (0) of the dividend behind the 687 and repeat the process: 6870 / 851

Moving on to step 5:
If we divide 6870 by 851, we get 8 and a remainder of 62.
Put 8 as the next digit of the answer. 
Result so far: 78.0
Subtracting 6808 from 6870 leaves us with 62.
Append the next digit (6) from the dividend to 62 and continue with: 626 / 851

Step 6:
When dividing 626 by 851, we get 0 with a remainder of 626.
Put 0 as the next digit of the answer. 
Result so far: 780.0
Subtract 0 from 626 to get 626.
Append the next digit (8) from the dividend to 626 and continue with: 6268 / 851

Going ahead to step 7:
851 goes into 6268 7 times with a remainder of 311.
Use 7 as the next digit of our solution. 
Result so far: 7807.0
The remainder is 311 after subtracting 5957 from 6268.
Include the next digit (0) from the dividend after 311, then repeat: 3110 / 851

Going ahead to step 8:
851 can be fit into 3110 3 times, resulting in a remainder of 557.
The number 3 becomes the next digit in our result. 
Result so far: 78073.0
Subtract 2553 from 3110 to get 557.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5570, and continue the process.

Moving on to step 9:
The number 851 fits into 5570 6 times, leaving a remainder of 464.
Record the quotient 6 as the next digit in the result. 
Result so far: 78073.6
Subtracting 5106 from 5570 leaves us with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Step 10:
The number 851 fits into 4640 5 times, leaving a remainder of 385.
Use 5 as the next digit of our solution. 
Result so far: 78073.65
The remainder is 385 after subtracting 4255 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Advancing to step 11:
851 can be fit into 3850 4 times, resulting in a remainder of 446.
Use 4 as the next digit of our solution. 
Result so far: 78073.654
If we take 3404 away from 3850, we end up with 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

Going ahead to step 12:
When dividing 4460 by 851, we get 5 with a remainder of 205.
Record the quotient 5 as the next digit in the result. 
Result so far: 78073.6545
The remainder is 205 after subtracting 4255 from 4460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

On to step 13:
2050 divided by 851 is 2 with a remainder of 348.
The next digit of our result is 2. 
Result so far: 78073.65452
If we subtract 1702 from 2050, we get 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Advancing to step 14:
The number 851 fits into 3480 4 times, leaving a remainder of 76.
Use 4 as the next digit of our solution. 
Result so far: 78073.654524
Deduct 3404 from 3480 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Going ahead to step 15:
851 goes into 760 0 times with a remainder of 760.
The number 0 becomes the next digit in our result. 
Result so far: 78073.654524
If we take 0 away from 760, 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.

Going ahead to step 16:
When dividing 7600 by 851, we get 8 with a remainder of 792.
Put 8 as the next digit of the answer. 
Result so far: 78073.65452408
If we take 6808 away from 7600, we end up with 792.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7920, and continue the process.

In conclusion, the division gives 78073.65452408 with a balance of 7.92e-07.