A rectangular fish pond with a circumference of 300 meters is twice as long as it is wide. If 2.25 kilograms of fish are produced per square meter, how many kilograms of fish are produced in total?
一个周长是300米的长方形鱼塘，长是宽的2倍．如果每平方米产鱼2.25千克，一共产鱼多少千克？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">300 / 2 / 3</gadget>
<output>50</output>

<gadget id="calculator">50 * 2 * 50 * 1 * 2.25</gadget>
<output>11_250</output>

<result>11_250</result>