Mother has a square handkerchief with a side length of 8 decimeters. What is its area in square decimeters?
妈妈有一块正方形的手帕，它的边长是8分米．它的面积是多少平方分米？
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>