873170 ÷ 85 
We want to figure out the number of times 873170 can be divided by 85.

On to step 1:
When dividing 8 by 85, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 85

Going ahead to step 2:
85 goes into 87 1 times with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 85 from 87, we get 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 85

Moving on to step 3:
The number 85 fits into 23 0 times, leaving a remainder of 23.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 23, we get 23.
Include the next digit (1) from the dividend after 23, then repeat: 231 / 85

On to step 4:
When dividing 231 by 85, we get 2 with a remainder of 61.
Put 2 as the next digit of the answer. 
Result so far: 102.0
If we take 170 away from 231, we end up with 61.
Append the next digit (7) from the dividend to 61 and continue with: 617 / 85

On to step 5:
The number 85 fits into 617 7 times, leaving a remainder of 22.
The next digit of our result is 7. 
Result so far: 1027.0
Deduct 595 from 617 and we're left with 22.
Append the next digit (0) from the dividend to 22 and continue with: 220 / 85

Moving on to step 6:
85 can be fit into 220 2 times, resulting in a remainder of 50.
Put 2 as the next digit of the answer. 
Result so far: 10272.0
Subtract 170 from 220 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 7:
The number 85 fits into 500 5 times, leaving a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 10272.5
If we take 425 away from 500, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 8:
750 divided by 85 is 8 with a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 10272.58
Subtracting 680 from 750 leaves us 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.

Let's proceed to step 9:
85 goes into 700 8 times with a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 10272.588
Subtracting 680 from 700 leaves us 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.

The final outcome is 10272.588, with a leftover of 0.002.