An isosceles trapezoid is surrounded by a length of 32 decimeters of iron wire. The measured height is 3 decimeters and one waist is 5 decimeters. What is the area of this isosceles trapezoid in square decimeters?
用一段长32分米的铁丝围成一个等腰梯形，测得高是3分米，一条腰是5分米，这个等腰梯形的面积是多少平方分米．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">32 - 10</gadget>
<output>22</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">22 * (3/2)</gadget>
<output>33</output>

<result>33</result>