86210798 ÷ 857 
Let's see how many times 857 fits into 86210798.

Let's proceed to step 1:
857 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 857

Going ahead to step 2:
The number 857 fits into 86 0 times, leaving a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Take the next digit (2) from the dividend and append it to 86, then repeat: 862 / 857

Advancing to step 3:
857 goes into 862 1 times with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 857 from 862 to get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 857

Advancing to step 4:
857 can be fit into 51 0 times, resulting in a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 51 leaves us with 51.
Fetch the next digit (0) from the dividend, attach it to 51 and continue: 510 / 857

Advancing to step 5:
510 divided by 857 is 0 with a remainder of 510.
Put 0 as the next digit of the answer. 
Result so far: 100.0
If we take 0 away from 510, we end up with 510.
Append the next digit (7) from the dividend to 510 and continue with: 5107 / 857

Let's proceed to step 6:
857 can be fit into 5107 5 times, resulting in a remainder of 822.
The next digit of our result is 5. 
Result so far: 1005.0
If we subtract 4285 from 5107, we get 822.
Fetch the next digit (9) from the dividend, attach it to 822 and continue: 8229 / 857

On to step 7:
The number 857 fits into 8229 9 times, leaving a remainder of 516.
Use 9 as the next digit of our solution. 
Result so far: 10059.0
If we take 7713 away from 8229, we end up with 516.
Fetch the next digit (8) from the dividend, attach it to 516 and continue: 5168 / 857

On to step 8:
857 goes into 5168 6 times with a remainder of 26.
Put 6 as the next digit of the answer. 
Result so far: 100596.0
Subtract 5142 from 5168 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 9:
The number 857 fits into 260 0 times, leaving a remainder of 260.
Use 0 as the next digit of our solution. 
Result so far: 100596.0
The remainder is 260 after subtracting 0 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Going ahead to step 10:
857 can be fit into 2600 3 times, resulting in a remainder of 29.
Use 3 as the next digit of our solution. 
Result so far: 100596.03
Subtract 2571 from 2600 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 11:
When dividing 290 by 857, we get 0 with a remainder of 290.
Use 0 as the next digit of our solution. 
Result so far: 100596.03
If we subtract 0 from 290, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Moving on to step 12:
When dividing 2900 by 857, we get 3 with a remainder of 329.
Record the quotient 3 as the next digit in the result. 
Result so far: 100596.0303
The remainder is 329 after subtracting 2571 from 2900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

Advancing to step 13:
If we divide 3290 by 857, we get 3 and a remainder of 719.
The number 3 becomes the next digit in our result. 
Result so far: 100596.03033
If we take 2571 away from 3290, we end up with 719.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7190, and continue the process.

The final outcome is 100596.03033, with a leftover of 0.000719.