Xiaohua and Xiaoqiang each bought several pencils with 60 cents and 4 cents. The pencils they bought were both 5 cents and 7 cents, and Xiaohua bought more pencils than Xiaoqiang. How many more pencils did you buy than Xiaoqiang?
小华和小强各自用6角4分买了若干支铅笔，他们买来的铅笔中都是5分一支和7分一支的两种，而且小华买来的铅笔比小强多，小华比小强多买来铅笔多少支．
<gadget id="calculator">50 / 5</gadget>
<output>10</output>

<gadget id="calculator">14 / 7</gadget>
<output>2</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<gadget id="calculator">15 / 5</gadget>
<output>3</output>

<gadget id="calculator">49 / 7</gadget>
<output>7</output>

<gadget id="calculator">3 + 7</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<result>2</result>