math-calculator

name	math-calculator
description	Calculate mathematical expressions using shell commands. Use when the user asks to perform arithmetic calculations like addition, subtraction, multiplication, division, or powers.
license	Apache-2.0
compatibility	Requires bash with bc (basic calculator)

Math Calculator Skill

This skill calculates mathematical expressions using shell commands.

When to Use

Use this skill when the user asks to evaluate a numeric expression, such as:

• Basic arithmetic (add, subtract, multiply, divide)
• Expressions with parentheses
• Powers and square roots

Method

Pipe the expression into the bc (basic calculator) command:

echo "(2 + 3) * 4" | bc
# Output: 20

echo "2 ^ 10" | bc
# Output: 1024

For decimal results, set the scale first:

echo "scale=2; 10 / 3" | bc
# Output: 3.33

Instructions

1. Translate the user's question into a single bc expression.
2. Run it with the bash tool: echo "<expression>" | bc.
3. Report the number printed by bc as the answer.