There are 180 school days in the academic year. Aliyah packs a lunch half the time. Becky packs her lunch half as much as Aliyah. How many days a year does Becky pack her lunch?
Aliyah packs her lunch 1/2 the time, so in 180 school days / 2 = she packs her lunch 
<gadget id="calculator">180/2</gadget>
<output>90</output>
90 times.
Becky packs her lunch 1/2 as much as Aliyah, so 90 times / 2 = 
<gadget id="calculator">90/2</gadget>
<output>45</output>
45 times a year.

<result>45</result>