Plant trees on 2.5 hectares of land with a plant-to-plant spacing of 4 meters and a row spacing of 5 meters. How many trees can be planted in total?
把2.5公顷的土地按株距4米、行距5米植树．一共可植树多少棵．
<gadget id="calculator">2.5 * 10_000</gadget>
<output>25_000</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">25_000 / 20</gadget>
<output>1_250</output>

<result>1_250</result>