It costs 3 yuan to buy a ballpoint pen, and the price of a fountain pen is 6 times that of a ballpoint pen. How much is it to buy a fountain pen?
买一支圆珠笔3元钱，钢笔的价钱是圆珠笔的6倍，买一支钢笔多少钱？
<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<result>18</result>