There are 30 people from class 61 participating in the tree planting activity. The ratio of male to female students is 2:3. At this time, a few more male students came. At this time, male students accounted for 50% of the number of tree planters. How many male students came?
六1班有30人参加植树活动，男女同学比是2：3，这时又来了几个男同学，这时男同学占植树人数的50%，又来了多少个男同学？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/5) / (1/2)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">30 * (6/5)</gadget>
<output>36</output>

<gadget id="calculator">36 - 30</gadget>
<output>6</output>

<result>6</result>