The base of a triangle is 3.2m, the height is 4m, what is its area m**2.
一个三角形的底是3.2m，高是4m，它的面积是多少m**2．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">3.2 * 2</gadget>
<output>6.4</output>

<result>6.4</result>