We're dividing 645645 by 43 
We're looking to find how many times 43 goes into 645645.

On to step 1:
When dividing 6 by 43, 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 / 43

Let's proceed to step 2:
The number 43 fits into 64 1 times, leaving a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 43 from 64, we get 21.
Fetch the next digit (5) from the dividend, attach it to 21 and continue: 215 / 43

Advancing to step 3:
When dividing 215 by 43, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 15.0
Subtract 215 from 215 to get 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 43

Moving on to step 4:
6 divided by 43 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 150.0
If we subtract 0 from 6, we get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 43

Going ahead to step 5:
When dividing 64 by 43, we get 1 with a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 1501.0
If we take 43 away from 64, we end up with 21.
Take the next digit (5) from the dividend and append it to 21, then repeat: 215 / 43

Moving on to step 6:
If we divide 215 by 43, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 15015.0
If we take 215 away from 215, 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.

Let's proceed to step 7:
When dividing 0 by 43, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 15015.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
43 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 15015.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 15015.0 and a remainder of 0.0.