The base of a parallelogram is 9.1dm, and the height is 6dm. What is the area of the triangle vegetable field with the same base and height?
一个平行四边形的底是9.1dm，高是6dm，与它等底等高的三角形菜地的面积是多少．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">9.1 * 3</gadget>
<output>27.3</output>

<result>27.3</result>