Xiaoqing can buy 9 pencils for 2 yuan a piece with Xiaoqing’s money. How many pens can he buy for 6 yuan a pen with this money?
小青的钱买2元一支的铅笔可以买9支，如果用这些钱买6元一支的钢笔可以买几支？
<gadget id="calculator">9 / 6</gadget>
<output>3/2 = around 1.5</output>

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

<result>3</result>