We look at the division of 638751 by 66 
We want to figure out the number of times 638751 can be divided by 66.

Advancing to step 1:
The number 66 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 66

On to step 2:
The number 66 fits into 63 0 times, leaving a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 63 after subtracting 0 from 63.
Fetch the next digit (8) from the dividend, attach it to 63 and continue: 638 / 66

Moving on to step 3:
When dividing 638 by 66, we get 9 with a remainder of 44.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we subtract 594 from 638, we get 44.
Append the next digit (7) from the dividend to 44 and continue with: 447 / 66

Advancing to step 4:
447 divided by 66 is 6 with a remainder of 51.
The number 6 becomes the next digit in our result. 
Result so far: 96.0
If we subtract 396 from 447, we get 51.
Take the next digit (5) from the dividend and append it to 51, then repeat: 515 / 66

Advancing to step 5:
When dividing 515 by 66, we get 7 with a remainder of 53.
The number 7 becomes the next digit in our result. 
Result so far: 967.0
Subtracting 462 from 515 leaves us with 53.
Take the next digit (1) from the dividend and append it to 53, then repeat: 531 / 66

Going ahead to step 6:
66 goes into 531 8 times with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 9678.0
The remainder is 3 after subtracting 528 from 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
When dividing 30 by 66, we get 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 9678.0
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
The number 66 fits into 300 4 times, leaving a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 9678.04
The remainder is 36 after subtracting 264 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 9:
66 can be fit into 360 5 times, resulting in a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 9678.045
Deduct 330 from 360 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
When dividing 300 by 66, we get 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 9678.0454
The remainder is 36 after subtracting 264 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 11:
66 can be fit into 360 5 times, resulting in a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 9678.04545
Subtracting 330 from 360 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 12:
66 goes into 300 4 times with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 9678.045454
Subtract 264 from 300 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 13:
360 divided by 66 is 5 with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 9678.0454545
Subtract 330 from 360 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 14:
When dividing 300 by 66, we get 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 9678.04545454
The remainder is 36 after subtracting 264 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final result is 9678.04545454 with a remainder of 3.6e-08.