A triangular piece of land has a base length of 40 meters and a height of 15 meters. If an average of 7.5 kilograms of wheat can be harvested per square meter, how many kilograms of wheat can be harvested in this piece of land?
一块三角形地，底边长40米，高是15米，如果平均每平方米可以收7.5千克小麦，这块地一共可以收多少千克小麦？
<result>225</result>