15 students are playing whack-a-mole. Each male student hits an average of 70, and each female student hits an average of 40. The total number of male students is 60 more than that of female students. How many male students are there?
15名同学在玩打地鼠游戏，每个男同学平均打中70个，每个女同学平均打中40个，男同学打中的总数比女同学多60个，有多少个男同学？
<gadget id="calculator">40 * 15</gadget>
<output>600</output>

<gadget id="calculator">600 + 60</gadget>
<output>660</output>

<gadget id="calculator">70 + 40</gadget>
<output>110</output>

<gadget id="calculator">660 / 110</gadget>
<output>6</output>

<result>6</result>