There is a rectangular vegetable field with a length of 10 meters and a width of 8 meters. Grandpa plans to plant (2/4) of this field with eggplants. What is the area of the eggplants in square meters?
有一块长10米，宽8米的长方形菜地，爷爷准备把这块地的(2/4)种茄子，茄子的面积是多少平方米？
<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 * 8 * (1/2)</gadget>
<output>40</output>

<result>40</result>