We're dividing 171090 by 30 
We want to divide 171090 by 30.

Step 1:
1 divided by 30 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 30

On to step 2:
When dividing 17 by 30, we get 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 17, we end up with 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 30

Going ahead to step 3:
If we divide 171 by 30, we get 5 and a remainder of 21.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 21 after subtracting 150 from 171.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 30

On to step 4:
The number 30 fits into 210 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 57.0
Subtracting 210 from 210 leaves us with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 30

Advancing to step 5:
9 divided by 30 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 570.0
Subtract 0 from 9 to get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 30

Let's proceed to step 6:
If we divide 90 by 30, we get 3 and a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 5703.0
Subtracting 90 from 90 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.

Step 7:
30 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 5703.0
Deduct 0 from 0 and we're left 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:
The number 30 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5703.0
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.

The quotient of the division is 5703.0, and the remainder is 0.0.