A rectangle is 3 decimeters long and (9/10) decimeters wide. What is the area of this rectangle?
一个长方形长3分米，宽(9/10)分米．这个长方形的面积是多少平方分米？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">3 * (9/10)</gadget>
<output>27/10 = around 2.7</output>

<result>27/10 = around 2.7</result>