670890 divided by 18 
We want to divide 670890 by 18.

On to step 1:
If we divide 6 by 18, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 18

Step 2:
If we divide 67 by 18, we get 3 and a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 13 after subtracting 54 from 67.
Grab the next digit (0) from the dividend, add it to 13, then carry on: 130 / 18

Let's proceed to step 3:
If we divide 130 by 18, we get 7 and a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 37.0
Deduct 126 from 130 and we're left with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 18

Moving on to step 4:
48 divided by 18 is 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 372.0
If we take 36 away from 48, we end up with 12.
Bring next digit (9) of the dividend behind the 12 and repeat the process: 129 / 18

Let's proceed to step 5:
When dividing 129 by 18, we get 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 3727.0
If we subtract 126 from 129, we get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 18

Let's proceed to step 6:
When dividing 30 by 18, we get 1 with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 37271.0
The remainder is 12 after subtracting 18 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
18 goes into 120 6 times with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 37271.6
If we take 108 away from 120, we end up 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.
Put 6 as the next digit of the answer. 
Result so far: 37271.66
If we take 108 away from 120, we end up 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.

The final outcome is 37271.66, with a leftover of 0.012.