# R5 | openai/gpt-5.4-mini | run 2

## 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**. The conversion factor is **1 mile = 1.609344 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))

## Calculation
\[
100 \times 1.609344 = 160.9344
\]

If you want, I can also give you the quick mental-math approximation for miles to kilometers.
