In a right triangle, the ratio of the two sides is 3:4, and the sum of the lengths of the two sides is 28 cm. What is the area of the right triangle in square centimeters?
一个直角三角形，两条直角边的比是3：4，两条直角边的长度和是28厘米，这个直角三角形的面积是多少平方厘米．
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">28 * (3/7)</gadget>
<output>12</output>

<gadget id="calculator">28 - 12</gadget>
<output>16</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">16 * 6</gadget>
<output>96</output>

<result>96</result>