Xiaohua's average scores in Chinese, Mathematics, and English are 93 points, 90 points in Chinese, 98 points in Mathematics, and how many points in foreign languages.
小华语文、数学、英语三门考试的平均成绩是93分，语文90分，数学98分，外语多少分．
<gadget id="calculator">93 * 3</gadget>
<output>279</output>

<gadget id="calculator">279 - 90 - 98</gadget>
<output>91</output>

<result>91</result>