The ocean area on the earth is about 140% larger than the land area. The ocean area is 360 million square kilometers. How many billion square kilometers is the land area?
地球上海洋面积约比陆地面积大140%，海洋面积是3.6亿平方千米，陆地面积约是多少亿平方千米？
<gadget id="calculator">140 / 100</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">1 + (7/5)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">3.6 / (12/5)</gadget>
<output>1.5</output>

<result>1.5</result>