If the two sides of a right triangle are 3 meters and 4 meters respectively, and the hypotenuse is 5 meters, what is its area in square meters?
一个直角三角形的两条直角边分别是3米、4米，斜边为5米，那么它的面积是多少平方米平方米．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 * (3/2)</gadget>
<output>6</output>

<result>6</result>