We look at the division of 654621 by 66 
Let's see how many times 66 fits into 654621.

On to step 1:
If we divide 6 by 66, we get 0 and 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.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 66

Step 2:
66 can be fit into 65 0 times, resulting in a remainder of 65.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 65, we end up with 65.
Bring next digit (4) of the dividend behind the 65 and repeat the process: 654 / 66

Moving on to step 3:
654 divided by 66 is 9 with a remainder of 60.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 594 from 654 to get 60.
Fetch the next digit (6) from the dividend, attach it to 60 and continue: 606 / 66

Let's proceed to step 4:
66 can be fit into 606 9 times, resulting in a remainder of 12.
Put 9 as the next digit of the answer. 
Result so far: 99.0
If we take 594 away from 606, we end up with 12.
Take the next digit (2) from the dividend and append it to 12, then repeat: 122 / 66

Moving on to step 5:
The number 66 fits into 122 1 times, leaving a remainder of 56.
Record the quotient 1 as the next digit in the result. 
Result so far: 991.0
If we subtract 66 from 122, we get 56.
Grab the next digit (1) from the dividend, add it to 56, then carry on: 561 / 66

Moving on to step 6:
66 goes into 561 8 times with a remainder of 33.
Put 8 as the next digit of the answer. 
Result so far: 9918.0
Deduct 528 from 561 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 7:
The number 66 fits into 330 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 9918.5
If we take 330 away from 330, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
If we divide 0 by 66, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 9918.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
0 divided by 66 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 9918.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 9918.5 with a remaining 0.0.