A right triangle, the length of the side opposite the right angle is 5 cm, and the other two sides are 3 cm and 4 cm respectively, what is the height of the side opposite the right angle in cm?
一个直角三角形，直角所对的边长是5厘米，其余两边分别是3厘米和4厘米，直角所对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>