calculator

# Calculator Evaluate math expressions and perform unit conversions from the command line. ## Purpose Provide a safe, sandboxed calculator for arithmetic expressions and common unit conversions without relying on `eval()` or external services. ## Agent Instructions 1. Read this SKILL.md to understand capabilities. 2. Run `scripts/calc.py` with the user's expression or conversion. 3. Return the computed result to the user. ## Examples ### Usage ```bash # Arithmetic expressions python scripts/calc.py "2 + 3 * 4" python scripts/calc.py "(100 - 25) / 3" python scripts/calc.py "2 ** 10" # Percentage calculations python scripts/calc.py "15% of 200" # Unit conversions python scripts/calc.py "100 celsius to fahrenheit" python scripts/calc.py "5 miles to km" python scripts/calc.py "10 kg to lbs" ``` ### Output A single line with the result, e.g.: ``` Result: 14 ``` For conversions: ``` 100 celsius = 212.0 fahrenheit ``` ## Limitations - No symbolic algebra (no variables, no equations). - Only supports basic arithmetic operators: `+`, `-`, `*`, `/`, `**`, `%`, parentheses. - Unit conversions are limited to: celsius/fahrenheit, miles/km, kg/lbs, meters/feet. ## Troubleshooting | Problem | Fix | |---------|-----| | `Invalid expression` | Check for unsupported operators or variables | | `Unknown conversion` | Use supported units: celsius, fahrenheit, miles, km, kg, lbs, meters, feet |