> For the complete documentation index, see [llms.txt](https://docs.gpmautomate.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gpmautomate.com/automate-en/action-guides/text-and-number/math-execution.md).

# Math execute

Math execute is the action used to perform basic mathematical calculations (such as addition `+`, subtraction `-`, multiplication `*`, division `/`) or complex arithmetic expressions from available variables, and then store the result in an output variable.

#### Configuration parameters:

* Expression: The content of the mathematical calculation to be performed. You can combine specific numbers and available variables (For example: `(5 + 3) * 2` or `$price * $quantity`).
* Output variable: The name of the variable to store the result after the calculation is complete.

#### Practical example 1: Calculate the total order amount (Multiply and Add)

Suppose you are creating an automated purchasing script or scraping order data. You have the product quantity variable as `$quantity = 3`, the unit price variable as `$price = 150000`, and a fixed shipping fee of `30000`.

* Configuration:
  * Expression: Enter the expression `($price * $quantity) + 30000`
  * Output variable: Enter the variable name to store the result as `$totalAmount`.
* Result: The system will calculate the value as `480000` and assign it to the variable `$totalAmount`.

<figure><img src="/files/hYsLZLKjXZpMI8he630H" alt=""><figcaption></figcaption></figure>


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