The ratio of female workers to male workers in a factory is 7:8, and there are 56 male workers. How many female workers are there?
一个工厂女工和男工的人数比是7：8，其中男工56人，女工有多少人？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">56 * (7/8)</gadget>
<output>49</output>

<result>49</result>