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=
<gadget id="calculator">4*60+30</gadget>
<output>270</output>
270 minutes.
At 90 minutes per movie, Grandpa could watch a total of 270/90=
<gadget id="calculator">270/90</gadget>
<output>3</output>
3 entire movies in 4 hours and 30 minutes.
On Wednesday, he watched 2*3=
<gadget id="calculator">2*3</gadget>
<output>6</output>
6 movies.
Thus, during these two days, he could have watched as many as 3+6=
<gadget id="calculator">3+6</gadget>
<output>9</output>
9 movies.

<result>9</result>