There is a triangular rapeseed field with a base of 48 meters and a height of 25 meters. A total of 690 kilograms of rapeseeds are harvested. How many kilograms of rapeseeds are harvested on average per square meter?
有一块三角形的油菜地，底是48米，高是25米，共收油菜籽690千克，平均每平方米收油菜籽多少千克？
<gadget id="calculator">25 / 2</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">48 * (25/2)</gadget>
<output>600</output>

<gadget id="calculator">690 / 600</gadget>
<output>23/20 = around 1.15</output>

<result>23/20 = around 1.15</result>