A triangular board with a base of 7.5 decimeters and a height of 4.8 decimeters is painted on both sides. What is the painted area?
一块三角形木板，底是7.5分米，高是4.8分米，把它的正反两面都涂上漆，涂上漆的面积是多少？
<gadget id="calculator">4.8 / 2</gadget>
<output>2.4</output>

<gadget id="calculator">7.5 * 2.4 * 2</gadget>
<output>36</output>

<result>36</result>