If the base of a parallelogram is 4 meters and the height is 1.5 meters, what is the area in square meters of a triangle with the same base and height?
一个平行四边形的底是4米，高1.5米，与它等底等高的三角形的面积是多少平方米．
<gadget id="calculator">1.5 / 2</gadget>
<output>0.75</output>

<gadget id="calculator">4 * 0.75</gadget>
<output>3</output>

<result>3</result>