If the length of a rectangular piece of land is increased by 5 meters, the area will increase by 150 square meters; if the width is increased by 5 meters, the area will increase by 225 square meters. What is the original area of the land in square meters?
一块长方形土地，如果长增加5米，面积就增加150平方米；如果宽增加5米，面积就增加225平方米，这块地原有的面积是多少平方米？
<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<gadget id="calculator">225 / 5</gadget>
<output>45</output>

<gadget id="calculator">30 * 45</gadget>
<output>1_350</output>

<result>1_350</result>