Uncle Wang has a land of 220 square meters. He uses half of the area to grow vegetables. The area of water spinach accounts for (2/5) of the area of vegetables. What is the area of the field of water spinach in square meters?
王伯伯有一块220平方米的地，他用一半的面积种蔬菜，空心菜的面积占蔬菜面积的(2/5)，空心菜地的面积是多少平方米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">220 * (1/2) * (2/5)</gadget>
<output>44</output>

<result>44</result>