There is a rectangular ground with a length of 13.5 meters and a width of 8.5 meters in a residential area. If a square lawn with a side length of 0.5 meters is paved, how many pieces are needed?
某小区有一块长13.5米，宽8.5米的长方形地面，如果铺上边长为0.5米的正方形草坪，需要多少块？
<gadget id="calculator">13.5 * 8.5</gadget>
<output>114.75</output>

<gadget id="calculator">0.5 * 0.5</gadget>
<output>0.25</output>

<gadget id="calculator">114.75 / 0.25</gadget>
<output>459</output>

<result>459</result>