# R5 | deepseek/deepseek-v4-pro | run 2

## Prompt

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

## Response

100 miles is exactly 160.9344 kilometers. The conversion factor is **1 international mile = 1.609344 kilometers** — a value fixed by the 1959 international yard and pound agreement [mileconverter.com](https://mileconverter.com/mile-to-kilometer/).

The arithmetic is straightforward: multiply the number of miles by 1.609344.  
For 100 miles:  

\(100 \times 1.609344 = 160.9344 \text{ km}\) [quickunitconverter.com](https://quickunitconverter.com/length/100-miles-to-km/).

| Miles | Kilometers |
|-------|------------|
| 1     | 1.609344   |
| 5     | 8.04672    |
| 10    | 16.09344   |
| 50    | 80.4672    |
| 100   | 160.9344   |
| 1,000 | 1,609.344  |

All the above values are consistent with the official mile‑to‑kilometer table maintained by [unit-convert.com](https://unit-convert.com/length/miles-to-km.htm).

Would you like to convert a different speed, like miles per hour to kilometers per hour, using the same factor?
