A certain county has 960 square kilometers of arable land, of which the ratio of the area of dry land to the total area is 1:4, and the rest is paddy field. Later, a piece of wasteland was newly reclaimed as dry land, which accounts for 40% of the total dry land area. The newly reclaimed land What is the land area in square kilometers?
某县有耕地960平方千米，其中旱地面积与总面积的比是1：4，其余的是水田，后来新开垦了一块荒地作旱地，这是旱地面积占总旱地面积的40%，新开垦土地面积是多少平方千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/5) / (3/5)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/4) / (3/4)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/3) - (1/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">960 * (3/4) * (1/3)</gadget>
<output>240</output>

<result>240</result>