539604 ÷ 3 
We want to figure out the number of times 539604 can be divided by 3.

Step 1:
If we divide 5 by 3, we get 1 and a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 3 from 5, we get 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 3

Let's proceed to step 2:
If we divide 23 by 3, we get 7 and a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we subtract 21 from 23, we get 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 3

On to step 3:
The number 3 fits into 29 9 times, leaving a remainder of 2.
The next digit of our result is 9. 
Result so far: 179.0
If we take 27 away from 29, we end up with 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 3

Advancing to step 4:
When dividing 26 by 3, we get 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 1798.0
Subtract 24 from 26 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 3

Advancing to step 5:
When dividing 20 by 3, we get 6 with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 17986.0
Deduct 18 from 20 and we're left with 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 3

Advancing to step 6:
3 goes into 24 8 times with a remainder of 0.
The next digit of our result is 8. 
Result so far: 179868.0
Subtracting 24 from 24 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.

Going ahead to step 7:
3 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 179868.0
Subtract 0 from 0 to 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.

Advancing to step 8:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 179868.0
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.

The final outcome is 179868.0, with a leftover of 0.0.