A pen is 14.6 yuan, and a pencil is 0.58 yuan. Xiaohua bought 2 pens and several pencils, and the total cost is 43.7 yuan. How many pencils did Xiaohua buy? (solution by equation)
一支钢笔14.6元，一支铅笔0.58元，小华买了2支钢笔和若干支铅笔，共用去43.7元，小华买了多少支铅笔？(用方程解)
<gadget id="calculator">14.6 * 2</gadget>
<output>29.2</output>

<gadget id="calculator">43.7 - 29.2</gadget>
<output>14.5</output>

<gadget id="calculator">14.5 / 0.58</gadget>
<output>25</output>

<result>25</result>