A rectangular vegetable field is 260 meters long and half as wide as it is long. The little rabbit ran around the edge of the vegetable field, how many meters did it run?
一块长方形菜地，长260米，宽是长的一半．小兔子沿菜地的边跑了一圈，跑了多少米？
<gadget id="calculator">260 / 2</gadget>
<output>130</output>

<gadget id="calculator">260 + 130</gadget>
<output>390</output>

<gadget id="calculator">390 * 2</gadget>
<output>780</output>

<result>780</result>