The area of Taiwan Island in my country is 35,800 square kilometers, which is 1,900 square kilometers larger than Hainan Island. What is the area of Hainan Island?
我国的台湾岛面积是3.58万平方千米，比海南岛大0.19万平方千米，海南岛的面积是多少万平方千米．
<gadget id="calculator">3.58 - 0.19</gadget>
<output>3.39</output>

<result>3.39</result>