A rectangular vegetable field has an area of 60 square meters. Uncle Wang plans to use (1/4) of this field to grow tomatoes and (2/5) to grow cucumbers. How many square meters are planted in total for tomatoes and cucumbers?
一块长方形菜地的面积有60平方米，王伯伯准备用这块地的(1/4)种蕃茄，(2/5)种黄瓜，蕃茄和黄瓜一共种多少平方米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) + (2/5)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">60 * (13/20)</gadget>
<output>39</output>

<result>39</result>