The supermarket sold 75 bottles of juice on the first day, 25 bottles in the morning on the second day, 35 bottles in the afternoon, and 81 bottles on the third day. How many bottles of juice are sold in the supermarket on average in three days?
超市第一天卖了75瓶果汁，第二天上午卖了25瓶，下午卖了35瓶，第三天卖了81瓶，求超市三天平均每天卖果汁多少瓶？
<gadget id="calculator">75 + 25 + 35 + 81</gadget>
<output>216</output>

<gadget id="calculator">216 / 3</gadget>
<output>72</output>

<result>72</result>