A blackboard is 3.1 meters long and 1.2 meters wide. If it costs 9.6 yuan per square meter to paint this blackboard, how much is the total cost?
一块黑板长3.1米，宽1.2米．如果漆这块黑板每平方米要花9.6元，一共需要多少元？
<gadget id="calculator">3.1 * 1.2 * 9.6</gadget>
<output>35.712</output>

<result>35.712</result>