Let's divide 637661 by 66
We're looking to find how many times 66 goes into 637661.

Step 1:
The number 66 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 66

Advancing to step 2:
66 can be fit into 63 0 times, resulting in a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Include the next digit (7) from the dividend after 63, then repeat: 637 / 66

Step 3:
66 goes into 637 9 times with a remainder of 43.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 594 from 637 and we're left with 43.
Bring next digit (6) of the dividend behind the 43 and repeat the process: 436 / 66

On to step 4:
436 divided by 66 is 6 with a remainder of 40.
The number 6 becomes the next digit in our result. 
Result so far: 96.0
The remainder is 40 after subtracting 396 from 436.
Include the next digit (6) from the dividend after 40, then repeat: 406 / 66

Let's proceed to step 5:
66 goes into 406 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 966.0
The remainder is 10 after subtracting 396 from 406.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 66

Moving on to step 6:
66 can be fit into 101 1 times, resulting in a remainder of 35.
Use 1 as the next digit of our solution. 
Result so far: 9661.0
The remainder is 35 after subtracting 66 from 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 7:
The number 66 fits into 350 5 times, leaving a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 9661.5
If we subtract 330 from 350, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
The number 66 fits into 200 3 times, leaving a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 9661.53
If we take 198 away from 200, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 9:
When dividing 20 by 66, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 9661.53
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 10:
The number 66 fits into 200 3 times, leaving a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 9661.5303
Deduct 198 from 200 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 11:
The number 66 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 9661.5303
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
If we divide 200 by 66, we get 3 and a remainder of 2.
The next digit of our result is 3. 
Result so far: 9661.530303
Subtract 198 from 200 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 13:
The number 66 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 9661.530303
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
When dividing 200 by 66, we get 3 with a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 9661.53030303
If we subtract 198 from 200, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 9661.53030303 with a remaining 2e-09.