We're dividing 857858 by 3 
We want to figure out the number of times 857858 can be divided by 3.

On to step 1:
When dividing 8 by 3, we get 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 6 from 8, we get 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 3

Let's proceed to step 2:
3 goes into 25 8 times with a remainder of 1.
Use 8 as the next digit of our solution. 
Result so far: 28.0
If we take 24 away from 25, we end up with 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 3

Going ahead to step 3:
The number 3 fits into 17 5 times, leaving a remainder of 2.
Record the quotient 5 as the next digit in the result. 
Result so far: 285.0
Deduct 15 from 17 and we're left with 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 3

On to step 4:
The number 3 fits into 28 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 2859.0
If we take 27 away from 28, we end up with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 3

Advancing to step 5:
If we divide 15 by 3, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 28595.0
The remainder is 0 after subtracting 15 from 15.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 3

Let's proceed to step 6:
When dividing 8 by 3, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 285952.0
If we subtract 6 from 8, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 7:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 285952.6
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
3 goes into 20 6 times with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 285952.66
Subtract 18 from 20 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 285952.66, and the remainder is 0.002.