bamboo pole of 1 meter has a shadow length of 0.5 meters. If the shadow length of the big tree measured at the same time and at the same place is 8 meters, how many meters is the height of the big tree? (Solve with ratio)
1米的竹竿，影子长0.5米．如果同一时间、同一地点测得大树的影子长是8米，那么大树的高有多少米？(用比例解)
<gadget id="calculator">1 / 0.5</gadget>
<output>2</output>

<gadget id="calculator">2 * 8</gadget>
<output>16</output>

<result>16</result>