The swimming pool of the University of Science and Technology was originally 50 meters long. Later, part of it was occupied during the reconstruction of Taihu Road. The length of the swimming pool was reduced by 10 meters, resulting in a reduction of 300 square meters in area. What is the current area of the swimming pool in square meters?
科大游泳池原来长50米，后来太湖路改造时占用了一部分，游泳池的长减少了10米，结果面积减少了300平方米．游泳池现在的面积是多少平方米．
<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<gadget id="calculator">300 / 10</gadget>
<output>30</output>

<gadget id="calculator">40 * 30</gadget>
<output>1_200</output>

<result>1_200</result>