At a certain moment, Xiaohua measured the height of the bamboo pole to be 10 decimeters and the length of the shadow to be 6 decimeters. At the same time and at the same place, the shadow length of a building is measured to be 12.6 meters. What is the actual height of the building in meters?
小华在某一时刻，测得竹竿的高度为10分米，影长为6分米．在同一时刻、同一地点测得一幢大楼影长12.6米．这幢大楼的实际高度是多少米？
<gadget id="calculator">10 * 12.6</gadget>
<output>126</output>

<gadget id="calculator">126 / 6</gadget>
<output>21</output>

<result>21</result>