52509 ÷ 90 
We're looking to find how many times 90 goes into 52509.

On to step 1:
90 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 90

Step 2:
If we divide 52 by 90, we get 0 and a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 52, we end up with 52.
Bring next digit (5) of the dividend behind the 52 and repeat the process: 525 / 90

Moving on to step 3:
90 can be fit into 525 5 times, resulting in a remainder of 75.
The next digit of our result is 5. 
Result so far: 5.0
If we take 450 away from 525, we end up with 75.
Append the next digit (0) from the dividend to 75 and continue with: 750 / 90

Advancing to step 4:
90 can be fit into 750 8 times, resulting in a remainder of 30.
Record the quotient 8 as the next digit in the result. 
Result so far: 58.0
Subtracting 720 from 750 leaves us with 30.
Grab the next digit (9) from the dividend, add it to 30, then carry on: 309 / 90

Going ahead to step 5:
90 can be fit into 309 3 times, resulting in a remainder of 39.
Use 3 as the next digit of our solution. 
Result so far: 583.0
If we subtract 270 from 309, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 6:
90 can be fit into 390 4 times, resulting in a remainder of 30.
Use 4 as the next digit of our solution. 
Result so far: 583.4
If we take 360 away from 390, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 7:
300 divided by 90 is 3 with a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 583.43
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 583.433
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 583.433 with a remaining 0.003.