172552 ÷ 9 
We want to figure out the number of times 172552 can be divided by 9.

On to step 1:
If we divide 1 by 9, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 9

Step 2:
17 divided by 9 is 1 with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 9 from 17 leaves us with 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 9

Going ahead to step 3:
If we divide 82 by 9, we get 9 and a remainder of 1.
The next digit of our result is 9. 
Result so far: 19.0
Deduct 81 from 82 and we're left with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 9

Step 4:
If we divide 15 by 9, we get 1 and a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 191.0
If we subtract 9 from 15, we get 6.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 9

On to step 5:
When dividing 65 by 9, we get 7 with a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 1917.0
Subtracting 63 from 65 leaves us with 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 9

Step 6:
If we divide 22 by 9, we get 2 and a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 19172.0
If we subtract 18 from 22, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 7:
When dividing 40 by 9, we get 4 with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 19172.4
If we take 36 away from 40, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
When dividing 40 by 9, we get 4 with a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 19172.44
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The quotient of the division is 19172.44, and the remainder is 0.004.