What is the area of an isosceles right triangle whose sum of the two sides is 14 cm?
一个等腰直角三角形，两条腰的和是14厘米，它的面积是多少．
<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">7 * (7/2)</gadget>
<output>49/2 = around 24.5</output>

<result>49/2 = around 24.5</result>