There are 30 people in the art group, and 15 people in the sports group are twice as many as the art group. How many people are there in the sports group?
美术小组有30人，体育的比美术的2倍还多15人，体育小组有多少人．
<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">60 + 15</gadget>
<output>75</output>

<result>75</result>