If a room with a length of 6 meters and a width of 3 meters is paved with floor tiles, if a square floor tile with a side length of 3 decimeters is used, at least how many tiles are needed?
给一个长6米，宽3米的房间铺上地砖，若选用边长是3分米的正方形地砖，至少需要多少块？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/10) * (3/10)</gadget>
<output>9/100 = around 0.09</output>

<gadget id="calculator">3 / (9/100)</gadget>
<output>100/3 = around 33.333333</output>

<gadget id="calculator">6 * (100/3)</gadget>
<output>200</output>

<result>200</result>