We're dividing 899974 by 90 
We're looking to find how many times 90 goes into 899974.

Step 1:
When dividing 8 by 90, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 90

Going ahead to step 2:
When dividing 89 by 90, we get 0 with a remainder of 89.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 89 leaves us with 89.
Append the next digit (9) from the dividend to 89 and continue with: 899 / 90

Advancing to step 3:
90 goes into 899 9 times with a remainder of 89.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 810 from 899 leaves us with 89.
Take the next digit (9) from the dividend and append it to 89, then repeat: 899 / 90

Going ahead to step 4:
899 divided by 90 is 9 with a remainder of 89.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
If we take 810 away from 899, we end up with 89.
Append the next digit (7) from the dividend to 89 and continue with: 897 / 90

On to step 5:
90 can be fit into 897 9 times, resulting in a remainder of 87.
Write down 9 as next digit of the result. 
Result so far: 999.0
If we take 810 away from 897, we end up with 87.
Include the next digit (4) from the dividend after 87, then repeat: 874 / 90

On to step 6:
When dividing 874 by 90, we get 9 with a remainder of 64.
The next digit of our result is 9. 
Result so far: 9999.0
The remainder is 64 after subtracting 810 from 874.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 7:
If we divide 640 by 90, we get 7 and a remainder of 10.
The next digit of our result is 7. 
Result so far: 9999.7
Subtract 630 from 640 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
90 goes into 100 1 times with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 9999.71
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
The number 90 fits into 100 1 times, leaving a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 9999.711
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 9999.711 with a remainder of 0.001.