243309 ÷ 45 
Let's see how many times 45 fits into 243309.

Advancing to step 1:
45 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 45

Let's proceed to step 2:
When dividing 24 by 45, we get 0 with a remainder of 24.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 24, we end up with 24.
Bring next digit (3) of the dividend behind the 24 and repeat the process: 243 / 45

Advancing to step 3:
45 goes into 243 5 times with a remainder of 18.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 225 from 243 to get 18.
Take the next digit (3) from the dividend and append it to 18, then repeat: 183 / 45

Advancing to step 4:
The number 45 fits into 183 4 times, leaving a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 54.0
If we take 180 away from 183, we end up with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 45

Step 5:
45 goes into 30 0 times with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 540.0
If we take 0 away from 30, we end up with 30.
Include the next digit (9) from the dividend after 30, then repeat: 309 / 45

Let's proceed to step 6:
When dividing 309 by 45, we get 6 with a remainder of 39.
Use 6 as the next digit of our solution. 
Result so far: 5406.0
If we subtract 270 from 309, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 7:
45 goes into 390 8 times with a remainder of 30.
The next digit of our result is 8. 
Result so far: 5406.8
Subtract 360 from 390 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.

Let's proceed to step 8:
The number 45 fits into 300 6 times, leaving a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 5406.86
Subtracting 270 from 300 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.

Let's proceed to step 9:
45 can be fit into 300 6 times, resulting in a remainder of 30.
Record the quotient 6 as the next digit in the result. 
Result so far: 5406.866
If we take 270 away from 300, 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.

Our division results in 5406.866 with a remaining 0.003.