To translate the sentence into Spanish, it would be '¿Qué harías con un millón de dólares?'
To translate the sentence 'What would you do with a million dollars?' into Spanish, you would say, '¿Qué harías con un millón de dólares?'
This sentence is inquiring about hypothetical actions one would take if they had a million dollars.
In Spanish, 'Qué harías' translates to 'What would you do,' 'con' means 'with,' 'un millón de dólares' translates to 'a million dollars.'