The perimeter of an isosceles triangle is 16 cm, the length of one side is 5 cm, and the height of the base is 4 cm. What is the area of the triangle in square centimeters?
等腰三角形的周长是16厘米，一条腰长5厘米，底边上的高是4厘米，这个三角形的面积是多少平方厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>