Here are a few options for the description of the WordPress post_tag “計算機” (Calculator) in Traditional Chinese, along with explanations to help you choose the best fit:

**Option 1: Simple and Direct**

* **Description:** 用於數學計算的工具。

* **Translation:** A tool used for mathematical calculations.
* **Why it works:** Clear, concise, and covers the primary function of a calculator.

**Option 2: Slightly More Descriptive**

* **Description:** 各種計算的電子或機械裝置，協助進行數學运算。

* **Translation:** Electronic or mechanical devices for various calculations, aiding in mathematical operations.
* **Why it works:** This is a bit more detailed, encompassing both electronic and mechanical calculators and emphasizing their purpose.

**Option 3: Focused on Content**

* **Description:** 探討有關計算機使用、程式設計、歷史等相關文章的標籤。

* **Translation:** A tag for articles exploring topics related to calculator usage, programming, history, and so on.
* **Why it works:** If your blog posts cover a wider range of topics relating to calculators, this option is more appropriate; if your posts are only related to Calculators, then this would not fit.

**Option 4: Concise & Modern**

* **Description:** 數學運算的好幫手！

* **Translation:** A good helper for mathematical operations!
* **Why it works:** It focuses on its function

**Which to Choose?**

* **Consider your blog’s focus:** Do you mainly discuss the use of calculators, or do you delve into their history, programming, etc.?
* **Audience:** Is your audience tech-savvy or more general? The simpler options will appeal to a broader audience.
* **Choose the best fit for the context of how you use your tags.**

I’d lean towards **Option 1 or Option 4**, depending on if your blog focuses on the product or the function. They are professional, straightforward, and easily understood. Remember to edit the description in your WordPress tag settings.