One side of an isosceles triangle is 7cm and the other side is 6cm. How many centimeters of rope is needed to enclose this isosceles triangle?
一个等腰三角形的一条边是7cm，另一条边是6cm，围成这个等腰三角形至少需要多少厘米长的绳子．
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 7</gadget>
<output>19</output>

<result>19</result>