9 people lost their way in the mountains, and all their food was only enough for 5 days. The next day, the nine people met another group of lost people, who had no food at all. Everyone got together and counted the food again. The two teams ate together, and the amount of food each person ate remained the same, which was only enough for 3 days. How many people in the second team lost their way?
9个人在山中迷了路，他们所有的粮食只够吃5天．第二天，这9个人又遇到另外一队迷路的人，这队人一点粮食也没有．大家便合在一起，再一算粮食，两队人合吃，每人吃的粮食数不变，只够吃3天．第二队迷路的人有多少人．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">(1/5) * 4</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 9</gadget>
<output>1/45 = around 0.022222</output>

<gadget id="calculator">(1/5) / 3 / (1/45)</gadget>
<output>3</output>

<result>3</result>