The average height of Xiaoqing, Xiaolan and Xiaohong is 153cm. Xiaolan is 161cm tall, Xiaohong is 154cm tall, what is Xiaoqing's height in cm?
小青、小兰和小红的平均身高是153cm．小兰身高161cn，小红身高154cm，小青的身高是多少cm．
<gadget id="calculator">153 * 3</gadget>
<output>459</output>

<gadget id="calculator">459 - 161 - 154</gadget>
<output>144</output>

<result>144</result>