An archaeological team wanted to measure the height of an ancient pagoda. Due to lack of tools, they erected a 1-meter-long bamboo pole on the ground. (At the same time), the length of the measured bamboo pole is 0.8 meters. The shadow length of the ancient pagoda is 164 decimeters, how many meters is the actual height of the ancient pagoda?
某考古工作队想测出一古塔的高度，因工具不足，他们将长为1米的竹竿直立在地上．(同时)，量的竹竿影长0.8米．古塔影长164分米，古塔实际高多少米？
<gadget id="calculator">1 / 0.8</gadget>
<output>1.25</output>

<gadget id="calculator">164 / 10</gadget>
<output>82/5 = around 16.4</output>

<gadget id="calculator">1.25 * (82/5)</gadget>
<output>20.5</output>

<result>20.5</result>