There are 75 people in the art group, which is 15 people twice as many as the sports group. How many people are there in the sports group?
美术小组有75人，比体育小组的2倍还多15人，体育小组有多少人．
<gadget id="calculator">75 - 15</gadget>
<output>60</output>

<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<result>30</result>