(29/100) of the earth's surface area is land, and the rest is ocean. What percentage of the land's surface area does ocean account for?
地球表面积的(29/100)是陆地，剩下的是海洋，海洋占陆地表面积的几分之几？
<gadget id="calculator">29 / 100</gadget>
<output>29/100 = around 0.29</output>

<gadget id="calculator">1 - (29/100)</gadget>
<output>71/100 = around 0.71</output>

<result>71/100 = around 0.71</result>