521313 divided by 90 
We want to figure out the number of times 521313 can be divided by 90.

Let's proceed to step 1:
5 divided by 90 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 90

Advancing to step 2:
If we divide 52 by 90, we get 0 and a remainder of 52.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 52, we get 52.
Grab the next digit (1) from the dividend, add it to 52, then carry on: 521 / 90

Let's proceed to step 3:
If we divide 521 by 90, we get 5 and a remainder of 71.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 450 from 521 and we're left with 71.
Include the next digit (3) from the dividend after 71, then repeat: 713 / 90

Step 4:
If we divide 713 by 90, we get 7 and a remainder of 83.
Use 7 as the next digit of our solution. 
Result so far: 57.0
Subtracting 630 from 713 leaves us with 83.
Take the next digit (1) from the dividend and append it to 83, then repeat: 831 / 90

Let's proceed to step 5:
When dividing 831 by 90, we get 9 with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 579.0
If we subtract 810 from 831, we get 21.
Bring next digit (3) of the dividend behind the 21 and repeat the process: 213 / 90

On to step 6:
90 goes into 213 2 times with a remainder of 33.
Record the quotient 2 as the next digit in the result. 
Result so far: 5792.0
If we subtract 180 from 213, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 7:
The number 90 fits into 330 3 times, leaving a remainder of 60.
The next digit of our result is 3. 
Result so far: 5792.3
Subtract 270 from 330 to get 60.
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:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 5792.36
If we subtract 540 from 600, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
600 divided by 90 is 6 with a remainder of 60.
Use 6 as the next digit of our solution. 
Result so far: 5792.366
The remainder is 60 after subtracting 540 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

After the division, we end up with 5792.366 and a remainder of 0.006.