There is a rectangular vegetable field with a length of 45 meters and a width of 30 meters. In the middle of this vegetable field is a triangular pond with a bottom of 12 meters and a height of 8 meters. How many square meters can be grown in this vegetable field? ?
有一块长方形的菜地，长45米，宽30米，在这块菜地中间有一个三角的池塘，底为12米，高为8米，这块菜地可以种菜的面积有多少平方米？
<gadget id="calculator">45 * 30</gadget>
<output>1_350</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">1_350 - 48</gadget>
<output>1_302</output>

<result>1_302</result>