We look at the division of 86859798 by 170 
We want to divide 86859798 by 170.

Step 1:
If we divide 8 by 170, we get 0 and 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.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 170

Let's proceed to step 2:
The number 170 fits into 86 0 times, leaving a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Include the next digit (8) from the dividend after 86, then repeat: 868 / 170

On to step 3:
170 can be fit into 868 5 times, resulting in a remainder of 18.
Write down 5 as next digit of the result. 
Result so far: 5.0
The remainder is 18 after subtracting 850 from 868.
Bring next digit (5) of the dividend behind the 18 and repeat the process: 185 / 170

Let's proceed to step 4:
The number 170 fits into 185 1 times, leaving a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
Deduct 170 from 185 and we're left with 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 170

Let's proceed to step 5:
If we divide 159 by 170, we get 0 and a remainder of 159.
Use 0 as the next digit of our solution. 
Result so far: 510.0
Subtract 0 from 159 to get 159.
Include the next digit (7) from the dividend after 159, then repeat: 1597 / 170

On to step 6:
If we divide 1597 by 170, we get 9 and a remainder of 67.
Write down 9 as next digit of the result. 
Result so far: 5109.0
Deduct 1530 from 1597 and we're left with 67.
Grab the next digit (9) from the dividend, add it to 67, then carry on: 679 / 170

On to step 7:
If we divide 679 by 170, we get 3 and a remainder of 169.
Record the quotient 3 as the next digit in the result. 
Result so far: 51093.0
If we subtract 510 from 679, we get 169.
Grab the next digit (8) from the dividend, add it to 169, then carry on: 1698 / 170

Let's proceed to step 8:
When dividing 1698 by 170, we get 9 with a remainder of 168.
Put 9 as the next digit of the answer. 
Result so far: 510939.0
The remainder is 168 after subtracting 1530 from 1698.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Let's proceed to step 9:
If we divide 1680 by 170, we get 9 and a remainder of 150.
The next digit of our result is 9. 
Result so far: 510939.9
Deduct 1530 from 1680 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 10:
170 can be fit into 1500 8 times, resulting in a remainder of 140.
The next digit of our result is 8. 
Result so far: 510939.98
Subtract 1360 from 1500 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 11:
1400 divided by 170 is 8 with a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 510939.988
The remainder is 40 after subtracting 1360 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

In conclusion, the division gives 510939.988 with a balance of 0.004.