If 3 people can complete the work in 4 days, how many days can 2 people complete it (assuming the personal work efficiency is the same)
3人4天能完成的工作，2人多少天可以完成(假如个人工作效率相同)
<gadget id="calculator">3 * 4 * 1</gadget>
<output>12</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>