397509 divided by 66 
We're looking to find how many times 66 goes into 397509.

Step 1:
The number 66 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 66

On to step 2:
If we divide 39 by 66, we get 0 and a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Fetch the next digit (7) from the dividend, attach it to 39 and continue: 397 / 66

Step 3:
The number 66 fits into 397 6 times, leaving a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 396 from 397, we get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 66

On to step 4:
If we divide 15 by 66, we get 0 and a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 60.0
Deduct 0 from 15 and we're left with 15.
Append the next digit (0) from the dividend to 15 and continue with: 150 / 66

On to step 5:
If we divide 150 by 66, we get 2 and a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 602.0
If we subtract 132 from 150, we get 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 66

Moving on to step 6:
The number 66 fits into 189 2 times, leaving a remainder of 57.
Record the quotient 2 as the next digit in the result. 
Result so far: 6022.0
If we subtract 132 from 189, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 7:
570 divided by 66 is 8 with a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 6022.8
If we subtract 528 from 570, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
When dividing 420 by 66, we get 6 with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 6022.86
Subtract 396 from 420 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 9:
66 goes into 240 3 times with a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 6022.863
If we subtract 198 from 240, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 10:
If we divide 420 by 66, we get 6 and a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 6022.8636
If we take 396 away from 420, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 11:
66 goes into 240 3 times with a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 6022.86363
Deduct 198 from 240 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 12:
When dividing 420 by 66, we get 6 with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 6022.863636
If we subtract 396 from 420, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 13:
240 divided by 66 is 3 with a remainder of 42.
Write down 3 as next digit of the result. 
Result so far: 6022.8636363
Subtract 198 from 240 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 14:
66 goes into 420 6 times with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 6022.86363636
Subtract 396 from 420 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

After the division, we end up with 6022.86363636 and a remainder of 2.4e-08.