Grade 6 students perform gymnastics, line up in two rows and two rows each, forming a "well" shape. The number of participants in one row accounts for (1/5) of the number of participants, and the number of participants in the other row (3/4); The number of people in the vertical row accounts for (3/10) of the number of participants, and (9/8) the number of people in the other vertical row. How many people participate in the gymnastics performance?
六年级同学进行体操表演，排成横行、纵行各两行，成"井"字型，一个横行人数占参加人数的(1/5)，是另一横行人数的(3/4)；一个纵行人数占参加人数的(3/10)，是另一纵行人数的(9/8)，参加体操表演的有多少人？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(1/5) / (3/4)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">(3/10) / (9/8)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(4/15) - 1</gadget>
<output>-11/15 = around -0.733333</output>

<gadget id="calculator">(1/5) + (4/15) + (3/10) + (-11/15)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">4 / (1/30)</gadget>
<output>120</output>

<result>120</result>