A rectangular vegetable field is 60 meters long and 40 meters wide. There is a triangular pool in the middle of the vegetable field. The bottom side of the pool is 16 meters long and 20 meters high. How large is the cultivated area of this vegetable field?
一块长方形菜地，长60米，宽40米，在这块菜地中间有一个三角形水池，水池的底边长是16米，高是20米，这块菜地可以耕种的面积有多大？
<gadget id="calculator">60 * 40</gadget>
<output>2_400</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">16 * 10</gadget>
<output>160</output>

<gadget id="calculator">2_400 - 160</gadget>
<output>2_240</output>

<result>2_240</result>