Jack makes his own cold brew coffee.  He makes it in batches of 1.5 gallons.  He drinks 96 ounces of coffee every 2 days.  It takes 20 hours to make coffee.  How long does he spend making coffee over 24 days?
He makes it in batches of 1.5*128=
<gadget id="calculator">1.5*128</gadget>
<output>192</output>
192 ounces.
He drinks 96/2=
<gadget id="calculator">96/2</gadget>
<output>48</output>
48 ounces of coffee a day.
So he drinks the coffee in 192/48=
<gadget id="calculator">192/48</gadget>
<output>4</output>
4 days.
So in 24 days he makes 24/4=
<gadget id="calculator">24/4</gadget>
<output>6</output>
6 batches.
That means he spends 6*20=
<gadget id="calculator">6*20</gadget>
<output>120</output>
120 hours making coffee.

<result>120</result>