One day at 9 o'clock in the morning, an old man stood in front of a tall building, meditating hard, how to measure the height of the tall building? Looking at the crutch in his hand, the old man had a solution. The old man's walking stick is 0.8 meters long, and the shadow is 1.2 meters long. At this time, the shadow of the tall building is 150 meters long. Do you know how tall this tall building is?
某天上午9点，一位老人站在一座高楼前，苦苦冥想，如何测出高楼的高呢？看了看手中的拐杖，老人有了办法．老人的拐杖长0.8米，影长1.2米，此时高楼的影长150米，你知道这座高楼有多高吗？
<gadget id="calculator">1.2 / 0.8</gadget>
<output>1.5</output>

<gadget id="calculator">150 / 1.5</gadget>
<output>100</output>

<result>100</result>