509406 ÷ 2 
We're looking to find how many times 2 goes into 509406.

Moving on to step 1:
If we divide 5 by 2, we get 2 and a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 4 from 5 to get 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 2

Moving on to step 2:
10 divided by 2 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Subtract 10 from 10 to get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 2

Advancing to step 3:
2 goes into 9 4 times with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 254.0
If we subtract 8 from 9, we get 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 2

On to step 4:
The number 2 fits into 14 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 2547.0
Deduct 14 from 14 and we're left with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 2

Going ahead to step 5:
2 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 25470.0
If we take 0 away from 0, we end up with 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 2

On to step 6:
When dividing 6 by 2, we get 3 with a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 254703.0
Deduct 6 from 6 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:
The number 2 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 254703.0
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:
0 divided by 2 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 254703.0
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 254703.0 with a balance of 0.0.