We look at the division of 85809 by 4 
We're looking to find how many times 4 goes into 85809.

Step 1:
8 divided by 4 is 2 with a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 8 from 8 to get 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 4

Step 2:
4 goes into 5 1 times with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Subtracting 4 from 5 leaves us with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 4

Advancing to step 3:
If we divide 18 by 4, we get 4 and a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 214.0
Subtract 16 from 18 to get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 4

Advancing to step 4:
The number 4 fits into 20 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 2145.0
Subtracting 20 from 20 leaves us with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 4

Advancing to step 5:
4 can be fit into 9 2 times, resulting in a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 21452.0
Subtracting 8 from 9 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 6:
4 can be fit into 10 2 times, resulting in a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 21452.2
Deduct 8 from 10 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 7:
The number 4 fits into 20 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 21452.25
Subtract 20 from 20 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
If we divide 0 by 4, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 21452.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 21452.25
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 21452.25, and the remainder is 0.0.