The floor of Xiaomin's room is rectangular. The length is 5 meters, the width is 3 meters, and a wooden floor with a thickness of 2 cm is laid. How many cubic meters of wood are needed at least?
小敏房间的地面是长方形．长5米、宽3米，铺设了2厘米厚的木地板，至少需要木材多少立方米？
<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">5 * 3 * (1/50)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>