The height of the first floor is 3.5m. When you go from the ground to the fifth floor, what is the height you climb.
一层楼的高度为3.5m，当你从地面到五楼时，你爬的高度是多少．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 3.5</gadget>
<output>14</output>

<result>14</result>