We're dividing 639627 by 66 
Let's see how many times 66 fits into 639627.

On to step 1:
6 divided by 66 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 66

Going ahead to step 2:
If we divide 63 by 66, we get 0 and a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Include the next digit (9) from the dividend after 63, then repeat: 639 / 66

Advancing to step 3:
If we divide 639 by 66, we get 9 and a remainder of 45.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 594 from 639 and we're left with 45.
Take the next digit (6) from the dividend and append it to 45, then repeat: 456 / 66

Going ahead to step 4:
If we divide 456 by 66, we get 6 and a remainder of 60.
The next digit of our result is 6. 
Result so far: 96.0
Subtract 396 from 456 to get 60.
Append the next digit (2) from the dividend to 60 and continue with: 602 / 66

Going ahead to step 5:
66 goes into 602 9 times with a remainder of 8.
Write down 9 as next digit of the result. 
Result so far: 969.0
Deduct 594 from 602 and we're left with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 66

Going ahead to step 6:
If we divide 87 by 66, we get 1 and a remainder of 21.
The next digit of our result is 1. 
Result so far: 9691.0
If we subtract 66 from 87, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
The number 66 fits into 210 3 times, leaving a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 9691.3
If we take 198 away from 210, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 8:
66 can be fit into 120 1 times, resulting in a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 9691.31
If we take 66 away from 120, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 9:
66 goes into 540 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 9691.318
Subtracting 528 from 540 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 10:
66 can be fit into 120 1 times, resulting in a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 9691.3181
Subtracting 66 from 120 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 11:
When dividing 540 by 66, we get 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 9691.31818
The remainder is 12 after subtracting 528 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 12:
66 goes into 120 1 times with a remainder of 54.
Use 1 as the next digit of our solution. 
Result so far: 9691.318181
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 13:
66 goes into 540 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 9691.3181818
Deduct 528 from 540 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 14:
When dividing 120 by 66, we get 1 with a remainder of 54.
The next digit of our result is 1. 
Result so far: 9691.31818181
Subtracting 66 from 120 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

After the division, we end up with 9691.31818181 and a remainder of 5.4e-08.