85170098 ÷ 858 
We want to divide 85170098 by 858.

On to step 1:
The number 858 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 858

Going ahead to step 2:
If we divide 85 by 858, we get 0 and a remainder of 85.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 85 and we're left with 85.
Take the next digit (1) from the dividend and append it to 85, then repeat: 851 / 858

Moving on to step 3:
When dividing 851 by 858, we get 0 with a remainder of 851.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 851 to get 851.
Grab the next digit (7) from the dividend, add it to 851, then carry on: 8517 / 858

On to step 4:
If we divide 8517 by 858, we get 9 and a remainder of 795.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Deduct 7722 from 8517 and we're left with 795.
Include the next digit (0) from the dividend after 795, then repeat: 7950 / 858

Moving on to step 5:
858 can be fit into 7950 9 times, resulting in a remainder of 228.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
If we take 7722 away from 7950, we end up with 228.
Include the next digit (0) from the dividend after 228, then repeat: 2280 / 858

Advancing to step 6:
If we divide 2280 by 858, we get 2 and a remainder of 564.
The next digit of our result is 2. 
Result so far: 992.0
Subtracting 1716 from 2280 leaves us with 564.
Include the next digit (9) from the dividend after 564, then repeat: 5649 / 858

On to step 7:
The number 858 fits into 5649 6 times, leaving a remainder of 501.
Write down 6 as next digit of the result. 
Result so far: 9926.0
Subtracting 5148 from 5649 leaves us with 501.
Fetch the next digit (8) from the dividend, attach it to 501 and continue: 5018 / 858

Advancing to step 8:
When dividing 5018 by 858, we get 5 with a remainder of 728.
Put 5 as the next digit of the answer. 
Result so far: 99265.0
If we subtract 4290 from 5018, we get 728.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

Step 9:
858 goes into 7280 8 times with a remainder of 416.
Write down 8 as next digit of the result. 
Result so far: 99265.8
If we subtract 6864 from 7280, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Step 10:
4160 divided by 858 is 4 with a remainder of 728.
The number 4 becomes the next digit in our result. 
Result so far: 99265.84
The remainder is 728 after subtracting 3432 from 4160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

Advancing to step 11:
If we divide 7280 by 858, we get 8 and a remainder of 416.
Put 8 as the next digit of the answer. 
Result so far: 99265.848
Subtract 6864 from 7280 to get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Moving on to step 12:
When dividing 4160 by 858, we get 4 with a remainder of 728.
The next digit of our result is 4. 
Result so far: 99265.8484
Subtracting 3432 from 4160 leaves us with 728.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

Step 13:
If we divide 7280 by 858, we get 8 and a remainder of 416.
The number 8 becomes the next digit in our result. 
Result so far: 99265.84848
If we subtract 6864 from 7280, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

On to step 14:
When dividing 4160 by 858, we get 4 with a remainder of 728.
Use 4 as the next digit of our solution. 
Result so far: 99265.848484
Deduct 3432 from 4160 and we're left with 728.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

Let's proceed to step 15:
If we divide 7280 by 858, we get 8 and a remainder of 416.
Use 8 as the next digit of our solution. 
Result so far: 99265.8484848
If we subtract 6864 from 7280, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Moving on to step 16:
858 goes into 4160 4 times with a remainder of 728.
Record the quotient 4 as the next digit in the result. 
Result so far: 99265.84848484
If we take 3432 away from 4160, we end up with 728.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

In conclusion, the division gives 99265.84848484 with a balance of 7.28e-07.