The number of dancers is 60, which is 15 people less than three times the number of choirs. How many people are there in the chorus?
舞蹈人数60人，比合唱队人数的3倍还少15人，合唱队共有多少人？
<gadget id="calculator">60 + 15</gadget>
<output>75</output>

<gadget id="calculator">75 / 3</gadget>
<output>25</output>

<result>25</result>