What is the area of the square ground whose perimeter is 360 decimeters?
周长是360分米的正方形地面的面积是多少平方米？
<gadget id="calculator">360 / 4</gadget>
<output>90</output>

<gadget id="calculator">360 / 4 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">90 * (9/10)</gadget>
<output>81</output>

<result>81</result>