We look at the division of 643238 by 66 
Let's see how many times 66 fits into 643238.

Step 1:
When dividing 6 by 66, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 66

Moving on to step 2:
66 goes into 64 0 times with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Fetch the next digit (3) from the dividend, attach it to 64 and continue: 643 / 66

Advancing to step 3:
66 can be fit into 643 9 times, resulting in a remainder of 49.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtracting 594 from 643 leaves us with 49.
Include the next digit (2) from the dividend after 49, then repeat: 492 / 66

Going ahead to step 4:
The number 66 fits into 492 7 times, leaving a remainder of 30.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Deduct 462 from 492 and we're left with 30.
Bring next digit (3) of the dividend behind the 30 and repeat the process: 303 / 66

Step 5:
303 divided by 66 is 4 with a remainder of 39.
The next digit of our result is 4. 
Result so far: 974.0
Subtract 264 from 303 to get 39.
Fetch the next digit (8) from the dividend, attach it to 39 and continue: 398 / 66

On to step 6:
66 can be fit into 398 6 times, resulting in a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 9746.0
Subtracting 396 from 398 leaves us 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 7:
66 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 9746.0
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.

Advancing to step 8:
66 can be fit into 200 3 times, resulting in a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 9746.03
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.

Advancing to step 9:
20 divided by 66 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 9746.03
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.

On to step 10:
When dividing 200 by 66, we get 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 9746.0303
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.

Moving on to step 11:
66 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 9746.0303
Deduct 0 from 20 and we're left 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 12:
200 divided by 66 is 3 with a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 9746.030303
Subtracting 198 from 200 leaves us 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.

Step 13:
When dividing 20 by 66, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9746.030303
Subtract 0 from 20 to 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 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: 9746.03030303
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.

After the division, we end up with 9746.03030303 and a remainder of 2e-09.