John buys 1/2 gallon jugs of cold brew coffee every 4 days.  How many cups of coffee does he drink a day?
He drinks 128/2 = 
<gadget id="calculator">128/2</gadget>
<output>64</output>
64 ounces of coffee every 4 days.
That means he drinks 64/4 = 
<gadget id="calculator">64/4</gadget>
<output>16</output>
16 ounces of coffee a day.
So he drinks 16/8 = 
<gadget id="calculator">16/8</gadget>
<output>2</output>
2 cups a day.

<result>2</result>