If the diagonal of a square is 1.2 decimeters long, what is its area in square centimetres?
正方形的对角线长1.2分米，它的面积是多少平方厘米．
<gadget id="calculator">1.2 / 2</gadget>
<output>0.6</output>

<gadget id="calculator">0.6 / 2</gadget>
<output>0.3</output>

<gadget id="calculator">0.6 * 0.3 * 4 * 100</gadget>
<output>72</output>

<result>72</result>