The base of a triangle is 450 meters long and the height is 120 meters. What is the area of a parallelogram with the same base and height in meters**2.
一块三角形地的底边长是450米，高是120米，与它等底等高的平行四边形地的面积是多少米**2．
<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">450 * 60</gadget>
<output>27_000</output>

<gadget id="calculator">27_000 * 2</gadget>
<output>54_000</output>

<result>54_000</result>