Rule rrpetoqohvksmwkd

input(How much is a $coffee)
  && fact(A $coffee costs $x euros)
  => output($x Euros)

Loaded as

[id: rrpetoqohvksmwkd] input(How much is a $coffee|How much is an $coffee) && fact(a $coffee costs $x euros|an $coffee costs $x euros) => output($x Euros)