A right-angled triangle vegetable field, the three side lengths are 3 meters, 4 meters, 5 meters, how many square decimeters is the area of this vegetable field?
一块直角三角形菜地，三条边长分别是3米、4米、5米，这块菜地的面积是多少平方分米？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 * (3/2) * 100</gadget>
<output>600</output>

<result>600</result>