A rectangular pillowcase with a length of 52 cm and a width of 38 cm is sewed with lace around it. How many centimeters of lace do you need in total?
一个长方形枕套，长52厘米、宽38厘米，在他四周缝上花边，一共需要多少厘米长的花边？
<gadget id="calculator">52 + 38</gadget>
<output>90</output>

<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<result>180</result>