A certain elementary school bought 120 story books, which accounted for exactly 4/9 of the books bought. How many books did the school buy in total?
某小学买来120本故事书，正好占买来图书的(4/9)，学校共买来图书多少本？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">120 / (4/9)</gadget>
<output>270</output>

<result>270</result>