We look at the division of 171840 by 8 
We want to figure out the number of times 171840 can be divided by 8.

Moving on to step 1:
If we divide 1 by 8, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 8

Going ahead to step 2:
8 can be fit into 17 2 times, resulting in a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 16 from 17 leaves us with 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 8

Advancing to step 3:
8 can be fit into 11 1 times, resulting in a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 21.0
Subtract 8 from 11 to get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 8

Advancing to step 4:
38 divided by 8 is 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 214.0
If we take 32 away from 38, we end up with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 8

Step 5:
8 goes into 64 8 times with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 2148.0
Subtract 64 from 64 to get 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 8

On to step 6:
8 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 21480.0
The remainder is 0 after subtracting 0 from 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 7:
8 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 21480.0
If we take 0 away from 0, we end up 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.

On to step 8:
0 divided by 8 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 21480.0
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.

In conclusion, the division gives 21480.0 with a balance of 0.0.