Xiaoli took the ball three times, 16, 12, and 20 respectively. How many shots are taken on average?
小丽拍球，三次分别拍了16个，12个，20个．平均每次拍了多少个？
<gadget id="calculator">16 + 12 + 20</gadget>
<output>48</output>

<gadget id="calculator">48 / 3</gadget>
<output>16</output>

<result>16</result>