In the mid-term exam, Xiaohong averaged 85 points in Chinese and mathematics, and 91 points in English and science. What is the average score of Xiaohong's four subjects?
期中考试，小红语文和数学平均85分，英语和科学平均91分，小红的四科平均成绩是多少分．
<gadget id="calculator">85 * 2</gadget>
<output>170</output>

<gadget id="calculator">91 * 2</gadget>
<output>182</output>

<gadget id="calculator">170 + 182</gadget>
<output>352</output>

<gadget id="calculator">352 / 4</gadget>
<output>88</output>

<result>88</result>