The library bought 120 story books, and bought 50% more science books than story books. How many story books and science books did they buy?
图书馆买来120本故事书，买来的科技书比故事书多50%，买来的故事书和科技书共多少本？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">120 * (3/2)</gadget>
<output>180</output>

<gadget id="calculator">120 + 180</gadget>
<output>300</output>

<result>300</result>