The ratio of the sides of a triangle is 1:2:2, and the perimeter is 70cm, what is the length of the shortest side?
三角形的三边之比为1：2：2，周长是70cm，则最短的边长是多少？
<gadget id="calculator">1 + 2 + 2</gadget>
<output>5</output>

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

<gadget id="calculator">70 * (1/5)</gadget>
<output>14</output>

<result>14</result>