There are 36 people in the school table tennis team, 6 people 1.5 times more than the piano group. How many people are there in the piano group?
学校乒乓球队有36人，比钢琴组的1.5倍还多6人，钢琴组有多少人？
<gadget id="calculator">36 - 6</gadget>
<output>30</output>

<gadget id="calculator">30 / 1.5</gadget>
<output>20</output>

<result>20</result>