172591 divided by 30 
We're looking to find how many times 30 goes into 172591.

On to step 1:
The number 30 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 30

Step 2:
The number 30 fits into 17 0 times, leaving a remainder of 17.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 17 leaves us with 17.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 30

Let's proceed to step 3:
If we divide 172 by 30, we get 5 and a remainder of 22.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 150 from 172 to get 22.
Grab the next digit (5) from the dividend, add it to 22, then carry on: 225 / 30

Step 4:
30 goes into 225 7 times with a remainder of 15.
Write down 7 as next digit of the result. 
Result so far: 57.0
If we subtract 210 from 225, we get 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 30

Advancing to step 5:
30 goes into 159 5 times with a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 575.0
If we subtract 150 from 159, we get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 30

Moving on to step 6:
30 can be fit into 91 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 5753.0
If we take 90 away from 91, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
30 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 5753.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
When dividing 100 by 30, we get 3 with a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 5753.03
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
The number 30 fits into 100 3 times, leaving a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 5753.033
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 5753.033, with a leftover of 0.001.