The average score of Fangfang's three shots is 90 points, 98 points for the first shot, 88 points for the second shot, how many points for the third shot?
芳芳三次投篮的平均分是90分，第一次98分，第二次88分，第三次多少分？
<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<gadget id="calculator">270 - 88 - 98</gadget>
<output>84</output>

<result>84</result>