The lengths of the two sides of a right triangle are 3 cm and 4 cm respectively: the length of the hypotenuse is 5 cm, what is the length of the height on the hypotenuse in cm?
一个直角三角形的两条直角边分别长3厘米和4厘米：斜边长5厘米，斜边上的高长多少厘米？
<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>