The length of a basketball court is 26 meters, which is twice the width. What is the perimeter of the basketball court in meters?
一个篮球场的长是26米，是宽的2倍，这个篮球场的周长是多少米？
<gadget id="calculator">26 / 2</gadget>
<output>13</output>

<gadget id="calculator">26 + 13</gadget>
<output>39</output>

<gadget id="calculator">39 * 2</gadget>
<output>78</output>

<result>78</result>