Yang Yang reads a storybook, and the ones he has read are the ones he hasn’t read (1/3). The book has 120 pages in total. How many pages has he read?
杨阳看一本故事书，已经看的是没看的(1/3)，全书一共120页，他看了多少页？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">120 / (4/3)</gadget>
<output>90</output>

<gadget id="calculator">120 - 90</gadget>
<output>30</output>

<result>30</result>