Step 1. Determine the conversion formula
$1$ Joule $=0.000239$ kilo calories
Step 2. Express as conversion factors
$(1" Joule")/(0.000239" kcal")$ or $(0.000239" kcal")/(1" Joule")$
Step 3. Multiply given value by correct conversion factor
$325" Joules"xx(0.000239" kcal")/(1" Joule")=0.0777" kcal"$