Dongting Lake, a famous freshwater lake, has been reduced by 40% from the original 350 square kilometers due to soil erosion and other reasons. What is the current area of Dongting Lake?
著名的淡水湖--洞庭湖，因水土流失引起泥沙沉积等原因，面积已由原来的350平方千米缩小了40%，洞庭湖现在的面积是多少平方千米？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">350 * (3/5)</gadget>
<output>210</output>

<result>210</result>