A rectangular vegetable field with a length of 10 meters and a width of 5 meters is divided into two square fields of the same size. What is the area of each field in square meters?
一块长10米，宽5米的长方形菜地，分成两块同样大小的正方形地，每块地的面积是多少平方米．
<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<result>25</result>