Xiaohong's average score in Chinese, Mathematics, and Science was 90 in the last final exam, of which 92 in Mathematics and 95 in Chinese, so how much is she in Science?
小红在上期末考试中，语文、数学、科学三科的平均成绩是90分，其中数学92分，语文95分，那么科学多少分．
<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<gadget id="calculator">270 - 92 - 95</gadget>
<output>83</output>

<result>83</result>