646916 divided by 18 
Our goal is to divide 646916 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
Deduct 0 from 6 and we're left with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 18

On to step 2:
When dividing 64 by 18, we get 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 54 from 64, we get 10.
Include the next digit (6) from the dividend after 10, then repeat: 106 / 18

Step 3:
If we divide 106 by 18, we get 5 and a remainder of 16.
Use 5 as the next digit of our solution. 
Result so far: 35.0
If we take 90 away from 106, we end up with 16.
Include the next digit (9) from the dividend after 16, then repeat: 169 / 18

Step 4:
The number 18 fits into 169 9 times, leaving a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 359.0
Subtracting 162 from 169 leaves us with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 18

Going ahead to step 5:
18 can be fit into 71 3 times, resulting in a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 3593.0
If we take 54 away from 71, we end up with 17.
Grab the next digit (6) from the dividend, add it to 17, then carry on: 176 / 18

Going ahead to step 6:
18 goes into 176 9 times with a remainder of 14.
Put 9 as the next digit of the answer. 
Result so far: 35939.0
Subtract 162 from 176 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 7:
140 divided by 18 is 7 with a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 35939.7
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
If we divide 140 by 18, we get 7 and a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 35939.77
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 35939.77 with a remainder of 0.014.