A rectangular iron sheet is 18 decimeters long and 14 decimeters wide. Cut out the largest square from this iron sheet, what is the area of the remaining iron sheet after cutting it?
一块长方形铁皮长18分米，宽14分米．在这块铁皮上裁下一块最大的正方形，裁去后剩下的铁皮面积是多少平方分米？
<gadget id="calculator">18 * 14</gadget>
<output>252</output>

<gadget id="calculator">14 * 14</gadget>
<output>196</output>

<gadget id="calculator">252 - 196</gadget>
<output>56</output>

<result>56</result>