A rectangular lawn is 37 meters long. After the length is increased by 6 meters, the area increases by 90 square meters. What is the area of the lawn in square meters?
一块长方形草坪，长是37米，长增加6米后，面积增加了90平方米，原来这块草坪的面积是多少平方米？
<gadget id="calculator">90 / 6</gadget>
<output>15</output>

<gadget id="calculator">15 * 37</gadget>
<output>555</output>

<result>555</result>