A rectangular tablecloth is 132 cm long and 78 cm wide. What is the minimum length of lace required to sew lace all around?
一块长方形的桌布，长132厘米，宽78厘米．要在四周缝上花边，至少需要多少长的花边？
<gadget id="calculator">132 + 78</gadget>
<output>210</output>

<gadget id="calculator">210 * 2</gadget>
<output>420</output>

<result>420</result>