Shui Qing went to the stationery store and bought 3 ballpoint pens and 2 fountain pens. It is known that the price of one fountain pen is 8.5 yuan, and the price of one ballpoint pen is 1.5 yuan. How much did Shui Qing spend on the pen?
水清同学去文具店买了3支圆珠笔和2支钢笔，已知一支钢笔售价8.5元，一支圆珠笔售价1.5元．水清买笔一共花了多少钱？
<gadget id="calculator">3 * 1.5</gadget>
<output>4.5</output>

<gadget id="calculator">2 * 8.5</gadget>
<output>17</output>

<gadget id="calculator">4.5 + 17</gadget>
<output>21.5</output>

<result>21.5</result>