The school holds a gala. If 4 boys perform on stage, the boys in the audience are girls (5/6). How many people are there in total?
学校举行一次联欢晚会，若4名男生上台表演，台下男生是女生的(5/6)，男生下台后，4名女生上台表演，台下男生占女生的(7/8)．一共参加联欢晚会有多少人？
<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">(7/15) - (5/11)</gadget>
<output>2/165 = around 0.012121</output>

<gadget id="calculator">8 / (2/165)</gadget>
<output>660</output>

<gadget id="calculator">660 + 4</gadget>
<output>664</output>

<result>664</result>