172623 ÷ 2 
Let's see how many times 2 fits into 172623.

On to step 1:
When dividing 1 by 2, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 2

Going ahead to step 2:
The number 2 fits into 17 8 times, leaving a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 1 after subtracting 16 from 17.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 2

Moving on to step 3:
When dividing 12 by 2, we get 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 86.0
If we take 12 away from 12, we end up with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 2

Going ahead to step 4:
2 can be fit into 6 3 times, resulting in a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 863.0
Subtracting 6 from 6 leaves us with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 2

Moving on to step 5:
If we divide 2 by 2, we get 1 and a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 8631.0
Subtracting 2 from 2 leaves us with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 2

On to step 6:
2 can be fit into 3 1 times, resulting in a remainder of 1.
The next digit of our result is 1. 
Result so far: 86311.0
If we subtract 2 from 3, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
If we divide 10 by 2, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 86311.5
Deduct 10 from 10 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.

Let's proceed to step 8:
0 divided by 2 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 86311.5
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.

On to step 9:
When dividing 0 by 2, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 86311.5
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 86311.5, with a leftover of 0.0.