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

### Instruction:
 Jack wants to send thank you cards to everyone who got him a gift for his wedding. He sent out 200 invitations. 90% of people RSVPed but only 80% of people who RSVPed actually showed up. Then 10 people who showed up didn't get a gift. How many thank you cards does he need?


### Response:
 El número de personas que RSVPed es 200 * 0.9 = 180.
El número de personas que asistieron es 180 * 0.8 = 144.
El número de personas que dieron un regalo es 144 - 10 = 134.