The blackboard of Class 5 and 3 is 3.2 meters long and 1.5 meters wide. The students put lace around the blackboard. How many meters is the lace long?
五3班的黑板长3.2米，宽1.5米，同学们在黑板的一周围上花边，花边长多少米？
<gadget id="calculator">3.2 + 1.5</gadget>
<output>4.7</output>

<gadget id="calculator">4.7 * 2</gadget>
<output>9.4</output>

<result>9.4</result>