There is a rectangular flower bed in the courtyard of Lelejia, which is 2.4 meters long and 1.2 meters wide. If the flower bed is surrounded by large bluestones with a length of 0.2 meters, how many such large bluestones are needed? (The width of the large bluestone is ignored)
乐乐家的庭院里有一个长方形的花坛，长2.4米，宽1.2米，如果花坛周围用长0.2米的大青石围起来，需要多少块这样的大青石？(大青石的宽度忽略不计)
<gadget id="calculator">2.4 + 1.2</gadget>
<output>3.6</output>

<gadget id="calculator">2 / 0.2</gadget>
<output>10</output>

<gadget id="calculator">3.6 * 10</gadget>
<output>36</output>

<result>36</result>