806434 ÷ 90 
Let's see how many times 90 fits into 806434.

Step 1:
8 divided by 90 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 90

Let's proceed to step 2:
The number 90 fits into 80 0 times, leaving a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Take the next digit (6) from the dividend and append it to 80, then repeat: 806 / 90

On to step 3:
When dividing 806 by 90, we get 8 with a remainder of 86.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 86 after subtracting 720 from 806.
Append the next digit (4) from the dividend to 86 and continue with: 864 / 90

Advancing to step 4:
If we divide 864 by 90, we get 9 and a remainder of 54.
The next digit of our result is 9. 
Result so far: 89.0
Subtracting 810 from 864 leaves us with 54.
Append the next digit (3) from the dividend to 54 and continue with: 543 / 90

Let's proceed to step 5:
90 can be fit into 543 6 times, resulting in a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 896.0
If we subtract 540 from 543, we get 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 90

Step 6:
The number 90 fits into 34 0 times, leaving a remainder of 34.
Record the quotient 0 as the next digit in the result. 
Result so far: 8960.0
The remainder is 34 after subtracting 0 from 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 7:
340 divided by 90 is 3 with a remainder of 70.
The next digit of our result is 3. 
Result so far: 8960.3
Subtracting 270 from 340 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
700 divided by 90 is 7 with a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 8960.37
Subtracting 630 from 700 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 9:
If we divide 700 by 90, we get 7 and a remainder of 70.
The number 7 becomes the next digit in our result. 
Result so far: 8960.377
Deduct 630 from 700 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

In conclusion, the division gives 8960.377 with a balance of 0.007.