An artist spends 30 hours every week painting. If it takes her 3 hours to complete a painting, how many paintings can she make in four weeks?
She completes 30 hours/week / 3 hours/painting = 
<gadget id="calculator">30/3</gadget>
<output>10</output>
10 paintings/week.
So in one month, she paints 10 paintings/week * 4 weeks/month = 
<gadget id="calculator">10*4</gadget>
<output>40</output>
40 paintings.

<result>40</result>