The formula is $V_{\text{c (CA)}} = 1049.169472632525973 V_{\text{hhd (US)}}$, where $V_{\text{hhd (US)}} = 15$.
Therefore, $V_{\text{c (CA)}} = 15737.542089487889593$.
Answer: $15 \text{hhd (US)} = 15737.542089487889593 \text{c (CA)}$.