The earth's surface area is 510 million square kilometers, of which 362 million square kilometers is the ocean area, and the rest is the land area. How many billion square kilometers more is the ocean area than the land area?
地球表面积是5.1亿平方千米，其中3.62亿平方千米是海洋面积，其余的是陆地面积，海洋面积比陆地面积多多少亿平方千米？
<gadget id="calculator">5.1 - 3.62</gadget>
<output>1.48</output>

<gadget id="calculator">3.62 - 1.48</gadget>
<output>2.14</output>

<result>2.14</result>