851559 ÷ 10 
We want to divide 851559 by 10.

Let's proceed to step 1:
The number 10 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
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 / 10

Step 2:
The number 10 fits into 85 8 times, leaving a remainder of 5.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 80 from 85 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 10

Let's proceed to step 3:
The number 10 fits into 51 5 times, leaving a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 85.0
If we subtract 50 from 51, we get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 10

On to step 4:
15 divided by 10 is 1 with a remainder of 5.
The next digit of our result is 1. 
Result so far: 851.0
The remainder is 5 after subtracting 10 from 15.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 10

Let's proceed to step 5:
10 goes into 55 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 8515.0
The remainder is 5 after subtracting 50 from 55.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 10

Let's proceed to step 6:
10 goes into 59 5 times with a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 85155.0
Subtract 50 from 59 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
10 goes into 90 9 times with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 85155.9
Deduct 90 from 90 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.

Moving on to step 8:
When dividing 0 by 10, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 85155.9
Deduct 0 from 0 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.

On to step 9:
If we divide 0 by 10, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 85155.9
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.

After the division, we end up with 85155.9 and a remainder of 0.0.