857439 ÷ 8 
We want to divide 857439 by 8.

Let's proceed to step 1:
The number 8 fits into 8 1 times, leaving a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 0 after subtracting 8 from 8.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 8

Advancing to step 2:
5 divided by 8 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 5, we get 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 8

Step 3:
If we divide 57 by 8, we get 7 and a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 107.0
The remainder is 1 after subtracting 56 from 57.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 8

Let's proceed to step 4:
When dividing 14 by 8, we get 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 1071.0
The remainder is 6 after subtracting 8 from 14.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 8

Moving on to step 5:
63 divided by 8 is 7 with a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 10717.0
If we take 56 away from 63, we end up with 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 8

On to step 6:
If we divide 79 by 8, we get 9 and a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 107179.0
Deduct 72 from 79 and we're left 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.

Going ahead to step 7:
The number 8 fits into 70 8 times, leaving a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 107179.8
If we take 64 away from 70, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
If we divide 60 by 8, we get 7 and a remainder of 4.
The next digit of our result is 7. 
Result so far: 107179.87
The remainder is 4 after subtracting 56 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
When dividing 40 by 8, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 107179.875
Deduct 40 from 40 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
0 divided by 8 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 107179.875
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
0 divided by 8 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 107179.875
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 107179.875 and a remainder of 0.0.