The average height of two students is 90 cm, one of them is 110 cm, what is the height of the other student in cm?
两个同学的平均身高是90厘米，其中一个同学身高是110厘米，另一个同学身高是多少厘米．
<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<gadget id="calculator">180 - 110</gadget>
<output>70</output>

<result>70</result>