The sixth grade of a certain school went to the experimental base. The team moves at a speed of 7 km/h, and the courier at the tail of the team sends a notice to the head of the team at a speed of 11 km/h, and then immediately returns to the tail of the team at the same speed after delivery, taking 0.22 hours. The length of the team.
某校六年级去实验基地．队伍以7千米/时的速度行进，队尾的通信员以11千米/时的速度到队首送一份通知，送到后又立即按原速返回队尾，共用0.22小时，求这支队伍的长度．
<gadget id="calculator">0.22 * 11 * 11</gadget>
<output>26.62</output>

<gadget id="calculator">0.22 * 11 * 7</gadget>
<output>16.94</output>

<gadget id="calculator">0.22 * 7 * 11</gadget>
<output>16.94</output>

<gadget id="calculator">0.22 * 7 * 7</gadget>
<output>10.78</output>

<gadget id="calculator">16.94 - 16.94 - 10.78</gadget>
<output>-10.78</output>

<gadget id="calculator">26.62 + (-10.78)</gadget>
<output>15.84</output>

<gadget id="calculator">11 - 7</gadget>
<output>4</output>

<gadget id="calculator">11 + 7 + 4</gadget>
<output>22</output>

<gadget id="calculator">15.84 / 22</gadget>
<output>0.72</output>

<result>0.72</result>