A triangular wheat field has a base of 80m and a height of 40m, and 0.01kg of chemical fertilizer is applied per square meter. How many kilograms of chemical fertilizer is applied to this field?
一块三角形麦田，底是80m，高是40m，每平方米施化肥0.01kg，这块田一共施化肥多少千克？
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">80 * 20 * 0.01</gadget>
<output>16</output>

<result>16</result>