It seems like you might be looking for a specific mathematical calculation or concept relating to multiplying numbers by their tens digit.
To clarify, if you have a two-digit number, you can identify the tens digit and then multiply it by a specific factor or another number.
For example, let's take the number 34:
- The tens digit is 3.
- If you multiply by the tens digit (3) by another number (e.g., 10), you get: \[ 3 \times 10 = 30 \]
If you meant something different or have a specific example in mind, please provide more details!