We divide 603240 by 4
Our goal is to divide 603240 by 4.

On to step 1:
4 goes into 6 1 times with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 2 after subtracting 4 from 6.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 4

Step 2:
The number 4 fits into 20 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 15.0
Subtract 20 from 20 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 4

Let's proceed to step 3:
If we divide 3 by 4, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 150.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 4

On to step 4:
4 can be fit into 32 8 times, resulting in a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 1508.0
If we subtract 32 from 32, we get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 4

On to step 5:
The number 4 fits into 4 1 times, leaving a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 15081.0
Subtract 4 from 4 to get 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 4

Moving on to step 6:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 150810.0
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.

Advancing to step 7:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 150810.0
Deduct 0 from 0 and we're left 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.

Advancing to step 8:
When dividing 0 by 4, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 150810.0
Subtracting 0 from 0 leaves us 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.

In conclusion, the division gives 150810.0 with a balance of 0.0.