The two sides of a right triangle are 3 decimeters and 4 decimeters respectively, and the hypotenuse is 5 decimeters. How many decimeters is the height on the hypotenuse?
一个直角三角形的两条直角边分别是3分米和4分米，斜边是5分米，斜边上的高是多少分米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

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

<gadget id="calculator">6 * (2/5)</gadget>
<output>12/5 = around 2.4</output>

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