A triangular vegetable field has a height of 1.8 meters and a base of 15 meters. On average, 12 Chinese cabbages are planted per square meter. How many Chinese cabbages are planted in this vegetable field?
一块三角形菜地，高是1.8米，底是15米．平均每平方米种大白菜12棵，这块菜地共种了多少棵大白菜？
<gadget id="calculator">1.8 / 2</gadget>
<output>0.9</output>

<gadget id="calculator">15 * 0.9 * 12</gadget>
<output>162</output>

<result>162</result>