The school selected 48 people from the third and fourth grades to form the waist drum team. The ratio of the number of participants in the third and fourth grades was 5:3, and how many people participated in the waist drum team in the third grade.
学校从三、四年级中选出48人成立了腰鼓队，三、四年级参加人数的比是5：3，三年级参加腰鼓队多少人．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">48 * (5/8)</gadget>
<output>30</output>

<result>30</result>