We're dividing 851217 by 10 
We're looking to find how many times 10 goes into 851217.

Going ahead to step 1:
8 divided by 10 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 10

Step 2:
When dividing 85 by 10, we get 8 with a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 5 after subtracting 80 from 85.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 10

Going ahead to step 3:
10 can be fit into 51 5 times, resulting in a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 85.0
Subtract 50 from 51 to get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 10

Step 4:
When dividing 12 by 10, we get 1 with a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 851.0
If we take 10 away from 12, we end up with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 10

Moving on to step 5:
10 can be fit into 21 2 times, resulting in a remainder of 1.
The next digit of our result is 2. 
Result so far: 8512.0
Subtracting 20 from 21 leaves us with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 10

On to step 6:
The number 10 fits into 17 1 times, leaving a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 85121.0
If we take 10 away from 17, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
10 goes into 70 7 times with a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 85121.7
Subtract 70 from 70 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:
When dividing 0 by 10, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 85121.7
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.

Going ahead to step 9:
0 divided by 10 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 85121.7
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.

In conclusion, the division gives 85121.7 with a balance of 0.0.