Place Value Problem: Find the Number with Digits 8, 3, and 1

To solve this problem, we'll create a number using the given digit positions:

• Step 1: Identify the hundreds digit. The hundreds digit is 8, so this becomes the leading digit of our number.
• Step 2: Identify the tens digit. The tens digit is 3, placing this second in the number.
• Step 3: Identify the units digit. The units digit is 1, placing this at the end of the number.
• Step 4: Concatenate these digits to form the full number.

Following these steps:
- The hundreds digit is 8, so the number starts with 8.
- The tens digit is 3, making the next digit 3.
- The units digit is 1, so the final digit is 1.
By combining these, we obtain the number 831.

Therefore, the solution to the problem is $831$, which corresponds to choice 2.