857809 divided by 66 
We want to figure out the number of times 857809 can be divided by 66.

Step 1:
If we divide 8 by 66, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 66

On to step 2:
The number 66 fits into 85 1 times, leaving a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 66 away from 85, we end up with 19.
Append the next digit (7) from the dividend to 19 and continue with: 197 / 66

Let's proceed to step 3:
When dividing 197 by 66, we get 2 with a remainder of 65.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 65 after subtracting 132 from 197.
Bring next digit (8) of the dividend behind the 65 and repeat the process: 658 / 66

Step 4:
66 can be fit into 658 9 times, resulting in a remainder of 64.
The number 9 becomes the next digit in our result. 
Result so far: 129.0
If we take 594 away from 658, we end up with 64.
Take the next digit (0) from the dividend and append it to 64, then repeat: 640 / 66

Advancing to step 5:
If we divide 640 by 66, we get 9 and a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 1299.0
Subtracting 594 from 640 leaves us with 46.
Take the next digit (9) from the dividend and append it to 46, then repeat: 469 / 66

Advancing to step 6:
When dividing 469 by 66, we get 7 with a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 12997.0
Deduct 462 from 469 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
If we divide 70 by 66, we get 1 and a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 12997.1
Subtract 66 from 70 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 8:
66 can be fit into 40 0 times, resulting in a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 12997.1
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 9:
If we divide 400 by 66, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 12997.106
If we subtract 396 from 400, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
66 goes into 40 0 times with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 12997.106
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 11:
The number 66 fits into 400 6 times, leaving a remainder of 4.
The next digit of our result is 6. 
Result so far: 12997.10606
If we subtract 396 from 400, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 12:
If we divide 40 by 66, we get 0 and a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 12997.10606
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 13:
When dividing 400 by 66, we get 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 12997.1060606
Subtract 396 from 400 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 14:
The number 66 fits into 40 0 times, leaving a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 12997.1060606
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 12997.1060606 and a remainder of 4e-08.