Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Sam is twice as old as Sue. Kendra is 3 times as old as Sam. If Kendra is currently 18, what will be their total age in 3 years?


### Response:
 Kendra a 3 fois l'âge de Sam, donc 3 * 18 = 54.
Sam a deux fois l'âge de Sue, donc 54 / 2 = 27.
Sue a 27 ans, Kendra a 54 ans et Sam a 27 ans, ce qui fait un total de 27 + 54 + 27 = 108.
Dans 3 ans, Kendra aura 21 ans, Sam aura 30 ans et Sue aura 30 ans, ce qui fait un total de 21 + 30 + 30 = 81.