The base of a triangle is 40 cm and the height is 18 cm. What is the area of a parallelogram with the same base and height as the triangle?
一个三角形的底是40厘米，高是18厘米，与这个三角形等底等高的平行四边形的面积是多少平方厘米．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">40 * 9 * 2</gadget>
<output>720</output>

<result>720</result>