The number of girls in the school choir is 8 more than the total number (2/5), and the number of boys is 7/8. How many boys are there? (cannot be solved by equation)
学校合唱团女生人数比总人数的(2/5)多8人，男生人数是女生的(7/8)，男生有多少人？(不能用方程解)
<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

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

<gadget id="calculator">(8/15) - (2/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">8 / (2/15)</gadget>
<output>60</output>

<gadget id="calculator">60 * (8/15)</gadget>
<output>32</output>

<gadget id="calculator">60 - 32</gadget>
<output>28</output>

<result>28</result>