An isosceles triangle, the ratio of the two sides is 1:2, and the length of the shortest side is 10cm, what is the perimeter of the triangle in centimeters?
一个等腰三角形，两条边比是1：2，其中最短边长度是10cm，则这个三角形的周长是多少厘米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 / (1/2)</gadget>
<output>20</output>

<gadget id="calculator">20 + 20 + 10</gadget>
<output>50</output>

<result>50</result>