What is the area of a parallelogram whose base is 6 decimeters long and 40 centimeters high?
一个平行四边形的底边长6分米，高40厘米，面积是多少？
<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<gadget id="calculator">60 * 40</gadget>
<output>2_400</output>

<result>2_400</result>