435866 ÷ 9 
We want to figure out the number of times 435866 can be divided by 9.

Step 1:
The number 9 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 9

Going ahead to step 2:
When dividing 43 by 9, we get 4 with a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 36 away from 43, we end up with 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 9

Moving on to step 3:
9 can be fit into 75 8 times, resulting in a remainder of 3.
The next digit of our result is 8. 
Result so far: 48.0
Subtracting 72 from 75 leaves us with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 9

Advancing to step 4:
The number 9 fits into 38 4 times, leaving a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 484.0
The remainder is 2 after subtracting 36 from 38.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 9

Going ahead to step 5:
26 divided by 9 is 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 4842.0
Subtract 18 from 26 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 9

On to step 6:
The number 9 fits into 86 9 times, leaving a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 48429.0
Subtracting 81 from 86 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
If we divide 50 by 9, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 48429.5
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
If we divide 50 by 9, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 48429.55
Subtract 45 from 50 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 48429.55 and a remainder of 0.005.