There are 40 male workers and 25 female workers in a workshop of a certain factory. Now 10 new female workers are recruited. To keep the ratio of male to female workers unchanged, how many male workers should be recruited into the factory?
某工厂一车间有男工40人，女工25人，现在又新招了女工10人，要使男女工人数的比不变，应招多少男工入厂？
<gadget id="calculator">40 * 10</gadget>
<output>400</output>

<gadget id="calculator">400 / 25</gadget>
<output>16</output>

<result>16</result>