(3/5) of the total area of the campus is open space, and (2/3) of the open space is ready to be paved with lawns. What percentage of the total area of the campus is the lawn area?
校园总面积的(3/5)是空地，空地的(2/3)准备铺草坪．则铺草坪的面积占校园总面积的几分之几？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/5) * (2/3)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>