871290 divided by 18 
We want to figure out the number of times 871290 can be divided by 18.

Step 1:
8 divided by 18 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 18

Going ahead to step 2:
18 goes into 87 4 times with a remainder of 15.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 72 from 87 to get 15.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 18

Going ahead to step 3:
151 divided by 18 is 8 with a remainder of 7.
The next digit of our result is 8. 
Result so far: 48.0
The remainder is 7 after subtracting 144 from 151.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 18

Let's proceed to step 4:
72 divided by 18 is 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 484.0
If we take 72 away from 72, we end up with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 18

Step 5:
18 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 4840.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 18

Moving on to step 6:
If we divide 90 by 18, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 48405.0
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
0 divided by 18 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 48405.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
18 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 48405.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 48405.0, with a leftover of 0.0.