parallelogram whose height remains the same and whose base is reduced by 6 decimeters reduces its area by 30 square decimeters. If the base of the original parallelogram is 24 decimeters, what is the original area in square decimeters?
一个平行四边形，高不变，将底减少6分米后，面积减少了30平方分米．如果原来平行四边形的底是24分米，那么原来的面积是多少平方分米？
<gadget id="calculator">30 / 6</gadget>
<output>5</output>

<gadget id="calculator">24 * 5</gadget>
<output>120</output>

<result>120</result>