A ship leaked. Water was pouring into the ship at a uniform speed, and water had accumulated in the ship when the leak was discovered. At this time, if there are 12 people with equivalent skills, the accumulated water can be drained within 3 hours; if there are only 5 people, it will take 10 hours. How many people are needed to drain the accumulated water within 2 hours?
一艘船出现了渗漏．水正以均匀的速度向船内涌入，且发现漏水时船体内已有了积水．此时，如果有12个技术相当的人，可在3小时内将积水排干；如果只有5个人，则需要10小时．如果要在2小时内排干积水，共需要几人？
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">50 - 36</gadget>
<output>14</output>

<gadget id="calculator">10 - 3</gadget>
<output>7</output>

<gadget id="calculator">14 / 7</gadget>
<output>2</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">36 - 6</gadget>
<output>30</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">30 + 4</gadget>
<output>34</output>

<gadget id="calculator">34 / 2</gadget>
<output>17</output>

<result>17</result>