From a semicircle with a radius of 10 cm, cut a triangle as large as possible. What is the area of this triangle in square meters?
从一个半径为10厘米的半圆中，剪一个尽可能大的三角形，这个三角形的面积是多少平方米．
<gadget id="calculator">10 / 2 / 10_000</gadget>
<output>1/2_000 = around 0.0005</output>

<gadget id="calculator">10 * 2 * (1/2_000)</gadget>
<output>1/100 = around 0.01</output>

<result>1/100 = around 0.01</result>