Xiao Lin's average score in Chinese, Mathematics, and Foreign Language is 93 points. After adding the art score, the average score is 91 points. How many points did Xiao Lin get in art?
小林语文、数学、外语的三门课的平均成绩是93分，加上美术成绩后，平均成绩是91分，小林美术得了多少分？
<gadget id="calculator">91 * 4</gadget>
<output>364</output>

<gadget id="calculator">93 * 3</gadget>
<output>279</output>

<gadget id="calculator">364 - 279</gadget>
<output>85</output>

<result>85</result>