Grandpa Lou enjoys watching movies on the Hallmark channel, where every movie lasts 90 minutes.  If, on Tuesday, he watched several full-length movies on the Hallmark channel for a total of 4 hours and 30 minutes, and then on Wednesday he watched on the same channel twice as many movies as he did on Tuesday.  What is the maximum number of full-length movies Grandpa could have watched during these two days?
4 hours and 30 minutes is the same as 4*60+30=<<4*60+30=270>>270 minutes.
At 90 minutes per movie, Grandpa could watch a total of 270/90=<<270/90=3>>3 entire movies in 4 hours and 30 minutes.
On Wednesday, he watched 2*3=<<2*3=6>>6 movies.
Thus, during these two days, he could have watched as many as 3+6=<<3+6=9>>9 movies.
#### 9