We divide 509580 by 4
We want to divide 509580 by 4.

Step 1:
When dividing 5 by 4, we get 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 1 after subtracting 4 from 5.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 4

Moving on to step 2:
When dividing 10 by 4, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we take 8 away from 10, we end up with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 4

On to step 3:
If we divide 29 by 4, we get 7 and a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 127.0
Deduct 28 from 29 and we're left with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 4

On to step 4:
4 goes into 15 3 times with a remainder of 3.
The next digit of our result is 3. 
Result so far: 1273.0
Subtracting 12 from 15 leaves us with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 4

Advancing to step 5:
When dividing 38 by 4, we get 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 12739.0
Subtracting 36 from 38 leaves us with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 4

Step 6:
The number 4 fits into 20 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 127395.0
Deduct 20 from 20 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.

On to step 7:
When dividing 0 by 4, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 127395.0
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.

Moving on to step 8:
4 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 127395.0
If we subtract 0 from 0, we 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.

In conclusion, the division gives 127395.0 with a balance of 0.0.