The ocean area on the earth's surface is about 360 million square kilometers, 60 million square kilometers more than twice the land area. How many billion square kilometers is the land area?
地球表面的海洋面积大约是3.6亿平方千米，比陆地面积的2倍多0.6亿平方千米．陆地面积大约是多少亿平方千米？
<gadget id="calculator">3.6 - 0.6</gadget>
<output>3</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>