There was a batch of storybooks in the school library. After the senior students borrowed (2/5), the administrator bought another 180 from Xinhua Bookstore. How many storybooks did the grade student borrow?
学校图书室原有一批故事书，高年级学生借走(2/5)以后，管理员又从新华书店买来180本，新买来的故事书正好相当于原来的(1/4)，高年级学生借走故事书多少本？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">180 / (1/4)</gadget>
<output>720</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">720 * (2/5)</gadget>
<output>288</output>

<result>288</result>