The length of the base of a triangle is 450 meters and the height is 1200 decimeters. What is its area in m**2.
一块三角形地的底边长是450米，高是1200分米，它的面积是多少m**2．
<gadget id="calculator">1_200 / 10</gadget>
<output>120</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">450 * 60</gadget>
<output>27_000</output>

<result>27_000</result>