The area of Chaohu Lake is 750 square kilometers, which is smaller (3/5) than that of Hongze Lake. How many square kilometers is the area of Hongze Lake?
巢湖的面积是750平方千米，比洪泽湖面积小(3/5)，洪泽湖的面积是多少平方千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">750 / (2/5)</gadget>
<output>1_875</output>

<result>1_875</result>