A 60 cm long wire is used to form a right triangle. The ratio of the side lengths of the triangle is 3:4:5. What is the area of the triangle in square centimeters?
用60厘米长的一根铁丝围成一个直角三角形，三角形边长的比是3：4：5，这个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">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">60 * (1/4)</gadget>
<output>15</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">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">15 * 10</gadget>
<output>150</output>

<result>150</result>