A triangular vegetable field has a base of 12 meters and a height of 5 meters, and a total of 510 kilograms of vegetables can be harvested. How many kilograms of vegetables can be harvested per square meter on average?
一块三角形的菜地，它的底是12米，高是5米，共收蔬菜510千克，这块地平均每平方米收蔬菜多少千克？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">12 * (5/2)</gadget>
<output>30</output>

<gadget id="calculator">510 / 30</gadget>
<output>17</output>

<result>17</result>