The two sides of a right triangle are 30cm and 40cm respectively, the hypotenuse is 50cm, what is the height of the hypotenuse in cm?
一个直角三角形的两条直角边分别是30cm和40cm，斜边是50cm，斜边上高是多少cm．
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">2 / 50</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">30 * 20 * (1/25)</gadget>
<output>24</output>

<result>24</result>