It takes 24 seconds for Xiao Ming to go from the third floor to the fifth floor. At this speed, how many seconds does it take him to go from the third floor to the seventh floor?
小明从三楼上到五楼要24秒，照这个速度，他从三楼到七楼要用多少秒．
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

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

<gadget id="calculator">7 - 3</gadget>
<output>4</output>

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

<result>48</result>