There is a trapezoidal paddy field, the length of its upper base, lower base and height is 540 meters in total. It is known that the ratio of the upper base, lower base and height in meters is 2:4:3. How many hectares does this paddy field have?
有一块梯形水田，它的上底、下底和高的长共是540米，已知上底、下底和高的米数比是2：4：3．求这块水田有多少公顷？
<gadget id="calculator">2 + 4 + 3</gadget>
<output>9</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">540 * (2/9)</gadget>
<output>120</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">540 * (4/9)</gadget>
<output>240</output>

<gadget id="calculator">120 + 240</gadget>
<output>360</output>

<gadget id="calculator">3 / 9 / 2 / 10_000</gadget>
<output>1/60_000 = around 0.000017</output>

<gadget id="calculator">360 * 540 * (1/60_000)</gadget>
<output>81/25 = around 3.24</output>

<result>81/25 = around 3.24</result>