646972 ÷ 66 
We want to divide 646972 by 66.

On to step 1:
When dividing 6 by 66, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 66

Moving on to step 2:
66 goes into 64 0 times with a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Append the next digit (6) from the dividend to 64 and continue with: 646 / 66

Step 3:
The number 66 fits into 646 9 times, leaving a remainder of 52.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtracting 594 from 646 leaves us with 52.
Fetch the next digit (9) from the dividend, attach it to 52 and continue: 529 / 66

Let's proceed to step 4:
If we divide 529 by 66, we get 8 and a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 98.0
If we subtract 528 from 529, we get 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 66

Step 5:
When dividing 17 by 66, we get 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 980.0
Deduct 0 from 17 and we're left with 17.
Bring next digit (2) of the dividend behind the 17 and repeat the process: 172 / 66

Going ahead to step 6:
172 divided by 66 is 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 9802.0
The remainder is 40 after subtracting 132 from 172.
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 7:
66 goes into 400 6 times with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 9802.6
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.

Moving on to step 8:
66 goes into 40 0 times with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 9802.6
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:
66 can be fit into 400 6 times, resulting in a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 9802.606
Deduct 396 from 400 and we're left with 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 10:
66 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 9802.606
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 11:
When dividing 400 by 66, we get 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 9802.60606
Subtracting 396 from 400 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 12:
The number 66 fits into 40 0 times, leaving a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 9802.60606
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.

Let's proceed to step 13:
66 goes into 400 6 times with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 9802.6060606
Subtracting 396 from 400 leaves us with 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:
40 divided by 66 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 9802.6060606
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.

Our division results in 9802.6060606 with a remaining 4e-08.