The school bought 252 science and technology books, and bought story books (2/3) of science and technology books. How many story books did they buy?
学校买来科技书252本，买来的故事书是科技书的(2/3)，买来故事书多少本？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">252 * (2/3)</gadget>
<output>168</output>

<result>168</result>