If one boat is added, exactly 6 people can be accommodated in each boat, and if one boat is reduced, exactly 9 people can be accommodated in each boat. Do you know how many people there are in our class?
如果增加一条船，正好每船坐6个，如果减少一条船，正好每船坐9人．你知道我们班有多少人吗？
<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<gadget id="calculator">9 - 6</gadget>
<output>3</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">4 * 9</gadget>
<output>36</output>

<result>36</result>