If the base of a triangle is 10 decimeters and the height is 0.5 meters, what is its area in square meters?
一个三角形的底是10分米，高是0.5米，它的面积是多少平方米．
<gadget id="calculator">10 / 10</gadget>
<output>1</output>

<gadget id="calculator">0.5 / 2</gadget>
<output>0.25</output>

<gadget id="calculator">1 * 0.25</gadget>
<output>0.25</output>

<result>0.25</result>