840657 ÷ 18 
We want to divide 840657 by 18.

Let's proceed to step 1:
8 divided by 18 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 18

Moving on to step 2:
When dividing 84 by 18, we get 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 72 away from 84, we end up with 12.
Take the next digit (0) from the dividend and append it to 12, then repeat: 120 / 18

Step 3:
120 divided by 18 is 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 46.0
The remainder is 12 after subtracting 108 from 120.
Fetch the next digit (6) from the dividend, attach it to 12 and continue: 126 / 18

Going ahead to step 4:
If we divide 126 by 18, we get 7 and a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 467.0
Subtract 126 from 126 to get 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 18

Advancing to step 5:
18 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 4670.0
Subtract 0 from 5 to get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 18

On to step 6:
When dividing 57 by 18, we get 3 with a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 46703.0
The remainder is 3 after subtracting 54 from 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
18 goes into 30 1 times with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 46703.1
Deduct 18 from 30 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 8:
The number 18 fits into 120 6 times, leaving a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 46703.16
Deduct 108 from 120 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
18 can be fit into 120 6 times, resulting in a remainder of 12.
The next digit of our result is 6. 
Result so far: 46703.166
If we subtract 108 from 120, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 46703.166, with a leftover of 0.0012.