The ratio of male to female workers in a certain factory is 20:13. Later, the number of male and female workers increased by 60 at the same time. Now the ratio of male to female workers is 10:7. How many male workers were there originally?
某工厂男女工人数比为20：13，后来男工女工同时增加60人，现在男女工人数比为10：7，原来有多少男工？
<gadget id="calculator">10 / 7</gadget>
<output>10/7 = around 1.428571</output>

<gadget id="calculator">(10/7) * 60</gadget>
<output>600/7 = around 85.714286</output>

<gadget id="calculator">(600/7) - 60</gadget>
<output>180/7 = around 25.714286</output>

<gadget id="calculator">(10/7) * 13</gadget>
<output>130/7 = around 18.571429</output>

<gadget id="calculator">20 - (130/7)</gadget>
<output>10/7 = around 1.428571</output>

<gadget id="calculator">(180/7) / (10/7)</gadget>
<output>18</output>

<gadget id="calculator">20 * 18</gadget>
<output>360</output>

<result>360</result>