We look at the division of 539645 by 90 
We want to divide 539645 by 90.

On to step 1:
When dividing 5 by 90, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 90

On to step 2:
53 divided by 90 is 0 with a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 53 after subtracting 0 from 53.
Take the next digit (9) from the dividend and append it to 53, then repeat: 539 / 90

Advancing to step 3:
The number 90 fits into 539 5 times, leaving a remainder of 89.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 450 away from 539, we end up with 89.
Append the next digit (6) from the dividend to 89 and continue with: 896 / 90

On to step 4:
If we divide 896 by 90, we get 9 and a remainder of 86.
Write down 9 as next digit of the result. 
Result so far: 59.0
The remainder is 86 after subtracting 810 from 896.
Append the next digit (4) from the dividend to 86 and continue with: 864 / 90

Advancing to step 5:
The number 90 fits into 864 9 times, leaving a remainder of 54.
Write down 9 as next digit of the result. 
Result so far: 599.0
The remainder is 54 after subtracting 810 from 864.
Grab the next digit (5) from the dividend, add it to 54, then carry on: 545 / 90

On to step 6:
When dividing 545 by 90, we get 6 with a remainder of 5.
The next digit of our result is 6. 
Result so far: 5996.0
The remainder is 5 after subtracting 540 from 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
If we divide 50 by 90, we get 0 and a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 5996.0
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 8:
When dividing 500 by 90, we get 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 5996.05
If we take 450 away from 500, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 9:
If we divide 500 by 90, we get 5 and a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 5996.055
If we subtract 450 from 500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 5996.055, with a leftover of 0.005.