It took Lin Hong 24 seconds to go from the first floor to the third floor. How many seconds does it take to go from the first floor to the fifth floor at the same speed?
林宏从一楼到三楼用了24秒，它用同样的速度从一楼到五楼要用多少秒．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<result>48</result>