There used to be a rectangular fish pond with a width of 20 meters in Xingfu Village. Later, due to the expansion of the road, the width of the fish pond was reduced by 5 meters, so the area of the fish pond was reduced by 150 square meters. What is the current area of the fish pond in square meters?
幸福村原来有一个宽20米的长方形鱼池．后因扩建公路，鱼池宽减少了5米，这样鱼池的面积就减少了150平方米．现在鱼池的面积是多少平方米．
<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<gadget id="calculator">30 * 15</gadget>
<output>450</output>

<result>450</result>