In the mid-term exam, Beibei scored 91 points in Chinese, 86 points in mathematics, and 93 points in English. What is the average score of these three subjects?
期中考试，贝贝语文得了91分，数学得了86分，英语得了93分，这三科的平均成绩是多少分．
<gadget id="calculator">91 + 86 + 93</gadget>
<output>270</output>

<gadget id="calculator">270 / 3</gadget>
<output>90</output>

<result>90</result>