We look at the division of 515391 by 90 
Let's see how many times 90 fits into 515391.

On to step 1:
90 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 90

Moving on to step 2:
The number 90 fits into 51 0 times, leaving a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Take the next digit (5) from the dividend and append it to 51, then repeat: 515 / 90

Let's proceed to step 3:
If we divide 515 by 90, we get 5 and a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 450 from 515, we get 65.
Grab the next digit (3) from the dividend, add it to 65, then carry on: 653 / 90

Let's proceed to step 4:
If we divide 653 by 90, we get 7 and a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 57.0
The remainder is 23 after subtracting 630 from 653.
Take the next digit (9) from the dividend and append it to 23, then repeat: 239 / 90

Let's proceed to step 5:
If we divide 239 by 90, we get 2 and a remainder of 59.
The next digit of our result is 2. 
Result so far: 572.0
If we subtract 180 from 239, we get 59.
Take the next digit (1) from the dividend and append it to 59, then repeat: 591 / 90

Going ahead to step 6:
90 can be fit into 591 6 times, resulting in a remainder of 51.
Record the quotient 6 as the next digit in the result. 
Result so far: 5726.0
If we take 540 away from 591, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 7:
If we divide 510 by 90, we get 5 and a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 5726.5
The remainder is 60 after subtracting 450 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 8:
90 can be fit into 600 6 times, resulting in a remainder of 60.
Use 6 as the next digit of our solution. 
Result so far: 5726.56
Subtracting 540 from 600 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
When dividing 600 by 90, we get 6 with a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 5726.566
Subtracting 540 from 600 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

In conclusion, the division gives 5726.566 with a balance of 0.006.