We're dividing 509402 by 99 
We want to figure out the number of times 509402 can be divided by 99.

Let's proceed to step 1:
When dividing 5 by 99, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 99

Step 2:
99 can be fit into 50 0 times, resulting in a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Take the next digit (9) from the dividend and append it to 50, then repeat: 509 / 99

Advancing to step 3:
509 divided by 99 is 5 with a remainder of 14.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Deduct 495 from 509 and we're left with 14.
Append the next digit (4) from the dividend to 14 and continue with: 144 / 99

On to step 4:
144 divided by 99 is 1 with a remainder of 45.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
The remainder is 45 after subtracting 99 from 144.
Grab the next digit (0) from the dividend, add it to 45, then carry on: 450 / 99

Going ahead to step 5:
If we divide 450 by 99, we get 4 and a remainder of 54.
The next digit of our result is 4. 
Result so far: 514.0
Subtract 396 from 450 to get 54.
Take the next digit (2) from the dividend and append it to 54, then repeat: 542 / 99

Advancing to step 6:
The number 99 fits into 542 5 times, leaving a remainder of 47.
Use 5 as the next digit of our solution. 
Result so far: 5145.0
Subtracting 495 from 542 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 7:
When dividing 470 by 99, we get 4 with a remainder of 74.
Use 4 as the next digit of our solution. 
Result so far: 5145.4
Subtract 396 from 470 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 8:
99 can be fit into 740 7 times, resulting in a remainder of 47.
Record the quotient 7 as the next digit in the result. 
Result so far: 5145.47
If we subtract 693 from 740, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 9:
99 can be fit into 470 4 times, resulting in a remainder of 74.
The next digit of our result is 4. 
Result so far: 5145.474
If we take 396 away from 470, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 10:
The number 99 fits into 740 7 times, leaving a remainder of 47.
Use 7 as the next digit of our solution. 
Result so far: 5145.4747
Subtracting 693 from 740 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 11:
When dividing 470 by 99, we get 4 with a remainder of 74.
Write down 4 as next digit of the result. 
Result so far: 5145.47474
Subtract 396 from 470 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 12:
If we divide 740 by 99, we get 7 and a remainder of 47.
Record the quotient 7 as the next digit in the result. 
Result so far: 5145.474747
The remainder is 47 after subtracting 693 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 13:
If we divide 470 by 99, we get 4 and a remainder of 74.
Write down 4 as next digit of the result. 
Result so far: 5145.4747474
If we subtract 396 from 470, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 14:
740 divided by 99 is 7 with a remainder of 47.
Put 7 as the next digit of the answer. 
Result so far: 5145.47474747
If we subtract 693 from 740, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

After the division, we end up with 5145.47474747 and a remainder of 4.7e-08.