Xiaoyun did the rope skipping exercise. She jumped 67 times for the first time and 75 times for the second time. If she wants to achieve an average of 80 times for the three times, how many times should she jump at least for the third time.
小云做跳绳练习，第一次跳了67下，第二次跳了75下，她要想三次的平均成绩达到80下，第三次至少要跳多少下．
<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">240 - 67 - 75</gadget>
<output>98</output>

<result>98</result>