The rectangular pillowcase is 72 cm long and 55 cm wide, with lace trimmed around it. How long is the lace?
长方形枕套长72厘米，宽55厘米，四周修花花边，需要多长的花边？
<gadget id="calculator">72 + 55</gadget>
<output>127</output>

<gadget id="calculator">127 * 2</gadget>
<output>254</output>

<result>254</result>