village originally planned to build a rectangular fish pond with a length of 60 meters. Later, when it was built, the length was reduced by 10 meters and the area was reduced by 350 square meters. How many square meters of fish pond was originally planned to be built?
某村原计划建一个长为60米的长方形鱼塘，后来修建时，长减少10米，面积减少了350平方米，原计划修建多少平方米的鱼塘？
<gadget id="calculator">350 / 10</gadget>
<output>35</output>

<gadget id="calculator">35 * 60</gadget>
<output>2_100</output>

<result>2_100</result>