646493 ÷ 66 
Let's see how many times 66 fits into 646493.

On to step 1:
If we divide 6 by 66, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 66

Step 2:
The number 66 fits into 64 0 times, leaving a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Take the next digit (6) from the dividend and append it to 64, then repeat: 646 / 66

Advancing to step 3:
66 goes into 646 9 times with a remainder of 52.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 594 from 646 and we're left with 52.
Fetch the next digit (4) from the dividend, attach it to 52 and continue: 524 / 66

Moving on to step 4:
66 can be fit into 524 7 times, resulting in a remainder of 62.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Subtracting 462 from 524 leaves us with 62.
Grab the next digit (9) from the dividend, add it to 62, then carry on: 629 / 66

Advancing to step 5:
If we divide 629 by 66, we get 9 and a remainder of 35.
Put 9 as the next digit of the answer. 
Result so far: 979.0
Subtracting 594 from 629 leaves us with 35.
Fetch the next digit (3) from the dividend, attach it to 35 and continue: 353 / 66

On to step 6:
If we divide 353 by 66, we get 5 and a remainder of 23.
Put 5 as the next digit of the answer. 
Result so far: 9795.0
The remainder is 23 after subtracting 330 from 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 7:
230 divided by 66 is 3 with a remainder of 32.
Put 3 as the next digit of the answer. 
Result so far: 9795.3
Deduct 198 from 230 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 8:
320 divided by 66 is 4 with a remainder of 56.
The next digit of our result is 4. 
Result so far: 9795.34
If we take 264 away from 320, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 9:
66 can be fit into 560 8 times, resulting in a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 9795.348
The remainder is 32 after subtracting 528 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 10:
66 goes into 320 4 times with a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 9795.3484
The remainder is 56 after subtracting 264 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 11:
560 divided by 66 is 8 with a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 9795.34848
If we take 528 away from 560, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 12:
66 can be fit into 320 4 times, resulting in a remainder of 56.
Write down 4 as next digit of the result. 
Result so far: 9795.348484
Subtract 264 from 320 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 13:
66 can be fit into 560 8 times, resulting in a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 9795.3484848
If we subtract 528 from 560, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 14:
66 goes into 320 4 times with a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 9795.34848484
Deduct 264 from 320 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final result is 9795.34848484 with a remainder of 5.6e-08.