A box of soap is distributed to workers in a certain workshop, and each person can get 12 yuan on average. If it is only distributed to female workers, each person can get 20 yuan on average; if it is only distributed to male workers, how many yuan can each person get on average?
一箱肥皂分发给某车间工人，平均每人可分到12块．若只分给女工，平均每人可分到20块；若只分给男工，平均每人可分到多少块？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/12) - (1/20)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / (1/30)</gadget>
<output>30</output>

<result>30</result>