The number of girls in the school chess group originally accounted for (2/7), and later 5 girls participated in interest group activities, so that girls accounted for (3/8) of the group. How many girls are there in the chess team now?
学校象棋小组原来女生人数占(2/7)，后来又有5名女生参加兴趣小组活动，这样女生就占小组人数的(3/8)．现在象棋小组有女生多少人？
<gadget id="calculator">8 - 3</gadget>
<output>5</output>

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

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">5 / (1/5) / (5/8)</gadget>
<output>40</output>

<gadget id="calculator">40 * (3/8)</gadget>
<output>15</output>

<result>15</result>