The perimeter of each face of a cube is 20 cm, what is the sum of its sides?
一个正方体纸盒每个面的周长都是20厘米，它的棱长总和是多少？
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<result>60</result>