646813 ÷ 18 
We want to divide 646813 by 18.

Moving on to step 1:
The number 18 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 18

Advancing to step 2:
If we divide 64 by 18, we get 3 and a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 54 from 64 leaves us with 10.
Append the next digit (6) from the dividend to 10 and continue with: 106 / 18

Let's proceed to step 3:
18 can be fit into 106 5 times, resulting in a remainder of 16.
Put 5 as the next digit of the answer. 
Result so far: 35.0
Deduct 90 from 106 and we're left with 16.
Fetch the next digit (8) from the dividend, attach it to 16 and continue: 168 / 18

Let's proceed to step 4:
18 can be fit into 168 9 times, resulting in a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 359.0
Subtracting 162 from 168 leaves us with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 18

On to step 5:
The number 18 fits into 61 3 times, leaving a remainder of 7.
The next digit of our result is 3. 
Result so far: 3593.0
If we take 54 away from 61, we end up with 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 18

Let's proceed to step 6:
18 goes into 73 4 times with a remainder of 1.
The next digit of our result is 4. 
Result so far: 35934.0
Subtract 72 from 73 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
10 divided by 18 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 35934.0
If we take 0 away from 10, we end up 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.

Going ahead to step 8:
When dividing 100 by 18, we get 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 35934.05
If we subtract 90 from 100, we 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.

Let's proceed to step 9:
18 can be fit into 100 5 times, resulting in a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 35934.055
Deduct 90 from 100 and we're left 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 outcome is 35934.055, with a leftover of 0.001.