We're dividing 860079 by 90 
We want to divide 860079 by 90.

Going ahead to step 1:
When dividing 8 by 90, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 90

Let's proceed to step 2:
90 goes into 86 0 times with a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Append the next digit (0) from the dividend to 86 and continue with: 860 / 90

Going ahead to step 3:
90 goes into 860 9 times with a remainder of 50.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 810 from 860 leaves us with 50.
Fetch the next digit (0) from the dividend, attach it to 50 and continue: 500 / 90

On to step 4:
When dividing 500 by 90, we get 5 with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 95.0
If we take 450 away from 500, we end up with 50.
Bring next digit (7) of the dividend behind the 50 and repeat the process: 507 / 90

Moving on to step 5:
507 divided by 90 is 5 with a remainder of 57.
The next digit of our result is 5. 
Result so far: 955.0
Subtract 450 from 507 to get 57.
Grab the next digit (9) from the dividend, add it to 57, then carry on: 579 / 90

Advancing to step 6:
When dividing 579 by 90, we get 6 with a remainder of 39.
Write down 6 as next digit of the result. 
Result so far: 9556.0
Subtracting 540 from 579 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 7:
390 divided by 90 is 4 with a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 9556.4
Deduct 360 from 390 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
When dividing 300 by 90, we get 3 with a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 9556.43
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
90 goes into 300 3 times with a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 9556.433
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 9556.433, with a leftover of 0.003.