A rectangular iron plate is 12 meters long and wide (1/4) long. What is the area of this iron plate in square decimeters?
一块长方形的铁板长12米，宽是长的(1/4)，这块铁板的面积是多少平方分米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">12 * 12 * (1/4) * 100</gadget>
<output>3_600</output>

<result>3_600</result>