The area of a blackboard is 7.12 square meters, and the width of the blackboard is 1.6 meters. What is the perimeter of the blackboard? How much rice
一块黑板的面积是7.12平方米，黑板的宽是1.6米，那么黑板的周长是多少？多少米
<gadget id="calculator">7.12 / 1.6</gadget>
<output>4.45</output>

<gadget id="calculator">4.45 + 1.6</gadget>
<output>6.05</output>

<gadget id="calculator">6.05 * 2</gadget>
<output>12.1</output>

<result>12.1</result>