There is a flower bed with a width of 15 meters in front of the Kangle Community. Later, due to the need, the width of the flower bed was increased by 7 meters, and the length remained unchanged, so that the area of the flower bed increased by 210 square meters. What is the area of the original flower bed in square meters?
康乐小区前有一个宽15米的花坛．后来因需要将花坛的宽增加了7米，长不变，这样花坛的面积增加了210平方米．原来花坛的面积是多少平方米？
<gadget id="calculator">210 / 7</gadget>
<output>30</output>

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

<result>450</result>