triangular wheat field has a base of 30 meters and a height of 20 meters. If 500 kilograms of wheat are harvested per square meter, how many kilograms of wheat are harvested in this wheat field?
一块三角形麦地，底是30米，高20米．如果每平方米收小麦500千克，这块麦地一共收小麦多少千克？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">20 * 15 * 500</gadget>
<output>150_000</output>

<result>150_000</result>