The three sides of a right triangle are 3 cm, 4 cm, and 5 cm respectively. What is the height of the hypotenuse of the triangle in cm?
一个直角三角形的三条边分别是3厘米、4厘米、5厘米，这个三角形斜边上的高是多少厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 * 2 * (2/5)</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>