The perimeter of an isosceles triangle is 120 cm, and the ratio of the lengths of two sides is 1:2. What is the length of the shortest side of this triangle in cm?
一个等腰三角形的周长是120厘米，其中有两条边长度的比是1：2．那么这个三角形最短的边长度是多少厘米．
<gadget id="calculator">2 + 2 + 1</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">120 * (1/5)</gadget>
<output>24</output>

<result>24</result>