There is a rectangular flowerbed in Chang'an Primary School, which is 8 meters long. When building the campus, the length of the flower garden was increased by 3 meters, so the area of the flower garden was increased by 18 square meters. How many square meters was the garden originally?
长安小学有一块长方形花圃，长8米．在修建校园时，花圃的长增加了3米，这样花圃的面积就增加了18平方米．花圃原来是多少平方米？
<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<result>48</result>