Little Ding Ding did rope skipping exercises. He jumped 67 times for the first time and 76 times for the second time. If he wants to achieve an average score of 80 times in three times, how many times should he jump at least for the third time.
小丁丁做跳绳练习，第一次跳了67下，第二次跳了76下，如果想三次平均成绩达到80下，第三次至少要跳多少下．
<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">67 + 76</gadget>
<output>143</output>

<gadget id="calculator">240 - 143</gadget>
<output>97</output>

<result>97</result>