Rachel is an artist. She posts a speed painting video each week on her Instagram account to promote her work. To save time, she paints and records 4 videos at a time. It takes her about 1 hour to set up her painting supplies and her camera. Then she records herself painting for 1 hour per painting. She takes another 1 hour to clean up. Each video takes 1.5 hours to edit and post. How long does it take Rachel to produce a speed painting video?
Rachel spends 1 + 1 = 
<gadget id="calculator">1+1</gadget>
<output>2</output>
2 hours setting up and cleaning up.
She paints for 1 hour x 4 paintings = 
<gadget id="calculator">1*4</gadget>
<output>4</output>
4 hours.
Then she edits 1.5 hours x 4 videos = 
<gadget id="calculator">1.5*4</gadget>
<output>6</output>
6 hours.
She spends 2 + 4 + 6 = 
<gadget id="calculator">2+4+6</gadget>
<output>12</output>
12 hours to make 4 videos.
So Rachel spends 12 / 4 = 
<gadget id="calculator">12/4</gadget>
<output>3</output>
3 hours on each video.

<result>3</result>