Ingrid drinks 8 cups of water every day.  If there are 16 cups in a gallon, how many gallons of water does she drink in 30 days?
She drinks 8 cups of water a day so after 30 days she drinks 8*30 = 
<gadget id="calculator">8*30</gadget>
<output>240</output>
240 cups of water.
There are 16 cups in 1 gallon so she drinks 240/16 = 
<gadget id="calculator">240/16</gadget>
<output>15</output>
15 gallons of water in 30 days.

<result>15</result>