Cut off the largest circle on the iron sheet with a length of 8 decimeters and a width of 6 decimeters, what is the area of the remaining iron sheet?
在长8分米，宽6分米的铁皮上，剪掉一个最大的圆，剩下的铁皮的面积是多少．
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">48 - 28.26</gadget>
<output>19.74</output>

<result>19.74</result>