The base of a triangle is 1.8 meters and the height is 7 decimeters. What is its area in square decimeters?
三角形底边1.8米，高7分米，它的面积是多少平方分米．
<gadget id="calculator">1.8 * 10</gadget>
<output>18</output>

<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">18 * (7/2)</gadget>
<output>63</output>

<result>63</result>