Use 60 cm long wire to form a right triangle, the ratio of the three sides of the triangle is 3:4:5. Find the area of the triangle?
用60厘米长的铁丝围成一个直角三角形，三角形三条边的比是3：4：5．求该三角形的面积？
<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">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">15 * 20 * (1/2)</gadget>
<output>150</output>

<result>150</result>