A medical team went to Lushan to participate in the rescue. The number of female members is 90% of the number of male members. If there are 9 more female members, the number of female members will be 20% more than the number of male members. How many male members will participate in the rescue?
一支医疗队去芦山参加救援，女队员人数是男队员人数的90%，如果再有9名女队员参加，则女队员人数比男队员人数多20%，参加救援的男队员有多少人？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(6/5) - (9/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">9 / (3/10)</gadget>
<output>30</output>

<result>30</result>