The perimeter of a right triangle is 60 cm, and the ratio of the lengths of the three sides is 3:4:5, find the height of the hypotenuse in cm.
一个直角三角形的周长是60厘米，三条边的长度比是3：4：5，求斜边上的高是多少厘米．
<gadget id="calculator">3 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">60 / 12</gadget>
<output>5</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">60 - 15 - 20</gadget>
<output>25</output>

<gadget id="calculator">2 / 25</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">150 * (2/25)</gadget>
<output>12</output>

<result>12</result>