Under the guidance of the coaches, Li Xiaofei conducts running training. The coach has recorded every run he has made, and now he has one last test. If you run for 10 seconds this time, the average score is 9.3 seconds. If you run for 6 seconds this time, the average score is 8.8 seconds. So how many times has Li Xiaofei been tested?
李小飞在教练员的指导下，进行跑步训练．教练员记录了他的每次跑步成绩，现在他还需进行最后一次测试．如果此次跑10秒，则平均成绩为9.3秒．如果此次跑6秒，则平均成绩为8.8秒．那么李小飞已经进行了多少次测试．
<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">9.3 - 8.8</gadget>
<output>0.5</output>

<gadget id="calculator">4 / 0.5</gadget>
<output>8</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<result>7</result>