When students eat, each person uses 2 bowls for rice and vegetables, and 2 people share 1 soup bowl. How many bowls are needed for 8 students?
同学们用餐，每人用2个碗，分别盛米饭和菜，2人共用1个汤碗，8名同学共需多少个碗？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 + (1/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">8 * (5/2)</gadget>
<output>20</output>

<result>20</result>