The area of Taiwan Island is 35,800 square kilometers, which is 1,900 square kilometers larger than Hainan Island. How many square kilometers are Taiwan Island and Hainan Island?
台湾岛的面积是3.58万平方千米，比海南岛大0.19万平方千米，台湾岛和海南岛一共多少万平方千米？
<gadget id="calculator">3.85 - 0.19</gadget>
<output>3.66</output>

<gadget id="calculator">3.66 + 3.85</gadget>
<output>7.51</output>

<result>7.51</result>