If the base of a parallelogram is 2 decimeters and the height is half of the base, what is the area of a triangle with the same base and height in square decimeters?
一个平行四边形的底是2分米，高是底的一半，与它等底等高的三角形的面积是多少平方分米．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 * 1 * (1/2)</gadget>
<output>1</output>

<result>1</result>