# R5 | openai/gpt-5.4-mini | run 1

## Prompt

How many kilometers are in 100 miles? Show the conversion factor and cite a source for it.

## Response

100 miles is **160.9344 kilometers**.

**Conversion factor:**  
\(1 \text{ mile} = 1.609344 \text{ kilometers}\) ([nist.gov](https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8?utm_source=openai)) [NIST Conversion](https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8)

**Calculation:**  
\(100 \times 1.609344 = 160.9344\) km

If you want, I can also give you the quick mental-approximation version.
