Let's divide 664209 by 85
We're looking to find how many times 85 goes into 664209.

Moving on to step 1:
6 divided by 85 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 85

Going ahead to step 2:
66 divided by 85 is 0 with a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Include the next digit (4) from the dividend after 66, then repeat: 664 / 85

Let's proceed to step 3:
The number 85 fits into 664 7 times, leaving a remainder of 69.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 595 from 664 to get 69.
Append the next digit (2) from the dividend to 69 and continue with: 692 / 85

Let's proceed to step 4:
When dividing 692 by 85, we get 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 78.0
Subtract 680 from 692 to get 12.
Take the next digit (0) from the dividend and append it to 12, then repeat: 120 / 85

Step 5:
85 goes into 120 1 times with a remainder of 35.
Put 1 as the next digit of the answer. 
Result so far: 781.0
Subtract 85 from 120 to get 35.
Fetch the next digit (9) from the dividend, attach it to 35 and continue: 359 / 85

Moving on to step 6:
If we divide 359 by 85, we get 4 and a remainder of 19.
Record the quotient 4 as the next digit in the result. 
Result so far: 7814.0
Deduct 340 from 359 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
If we divide 190 by 85, we get 2 and a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 7814.2
Deduct 170 from 190 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
When dividing 200 by 85, we get 2 with a remainder of 30.
The number 2 becomes the next digit in our result. 
Result so far: 7814.22
Subtract 170 from 200 to get 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 7814.22 with a remaining 0.03.