60 cm long iron wire is folded into a right triangle whose sides have a ratio of 3:4:5. What is the area of this right triangle in square centimeters?
把一根长60厘米的铁丝折成三条边长度的比是3：4：5的直角三角形，这个直角三角形的面积是多少平方厘米．
<gadget id="calculator">3 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">4 / 12</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">60 * (1/3)</gadget>
<output>20</output>

<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">60 * (1/4)</gadget>
<output>15</output>

<gadget id="calculator">15 / 2</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">20 * (15/2)</gadget>
<output>150</output>

<result>150</result>