We're dividing 53809 by 90 
Our goal is to divide 53809 by 90.

Moving on to step 1:
90 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 90

Going ahead to step 2:
90 can be fit into 53 0 times, resulting in a remainder of 53.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Take the next digit (8) from the dividend and append it to 53, then repeat: 538 / 90

Advancing to step 3:
90 can be fit into 538 5 times, resulting in a remainder of 88.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 450 from 538 and we're left with 88.
Take the next digit (0) from the dividend and append it to 88, then repeat: 880 / 90

Moving on to step 4:
880 divided by 90 is 9 with a remainder of 70.
The number 9 becomes the next digit in our result. 
Result so far: 59.0
Subtracting 810 from 880 leaves us with 70.
Take the next digit (9) from the dividend and append it to 70, then repeat: 709 / 90

Moving on to step 5:
709 divided by 90 is 7 with a remainder of 79.
Use 7 as the next digit of our solution. 
Result so far: 597.0
Subtracting 630 from 709 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 6:
When dividing 790 by 90, we get 8 with a remainder of 70.
The next digit of our result is 8. 
Result so far: 597.8
Deduct 720 from 790 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 7:
90 goes into 700 7 times with a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 597.87
If we subtract 630 from 700, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
If we divide 700 by 90, we get 7 and a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 597.877
If we take 630 away from 700, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

After the division, we end up with 597.877 and a remainder of 0.007.