The smallest sea in the world is the Sea of Marmara, with an area of about 11,350 square kilometers, which is 1,638 square kilometers more than four times the area of Taihu Lake in my country. How many square kilometers is the area of Taihu Lake in my country?
世界上最小的海是马尔马拉海，面积约是11350平方千米，比我国太湖面积的4倍还多1638平方千米．我国太湖的面积约是多少平方千米？
<gadget id="calculator">11_350 - 1_638</gadget>
<output>9_712</output>

<gadget id="calculator">9_712 / 4</gadget>
<output>2_428</output>

<result>2_428</result>