The number of people in the chorus is that of the dance team (4/5). After transferring 8 people from the dance team to the chorus, the number of people in the dance team is that of the chorus (7/8). How many people were there in the chorus?
合唱队人数是舞蹈队的(4/5)，从舞蹈队调8人到合唱队后，舞蹈队人数是合唱队的(7/8)，合唱队原来有多少人．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">8 * (7/8)</gadget>
<output>7</output>

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

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * (7/8)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">15 / (3/10)</gadget>
<output>50</output>

<gadget id="calculator">50 * (4/5)</gadget>
<output>40</output>

<result>40</result>