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

### Instruction:
 Mark has to wait 4 days for his first coronavirus vaccine appointment. Then he has to wait 20 days for his second vaccine appointment. Then he has to wait 2 weeks for the vaccine to be fully effective. How many days does Mark have to wait in total?


### Response:
 Hay 2 semanas entre la primera y la segunda vacuna, por lo que Mark tiene que esperar 2 * 7 = <<2*7=14>>14 días.
Entre los tres períodos de espera, Mark tiene que esperar 4 + 14 + 20 = <<4+14+20=38>>38 días.