Cut a rectangular cardboard with a length of 12 cm and a width of 8 cm into the largest semicircle. What is the area of the remaining cardboard after cutting?
把一张长12厘米、宽8厘米的长方形纸板，剪成一个最大的半圆，剪完后剩下的纸板的面积是多少？
<gadget id="calculator">12 * 8</gadget>
<output>96</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3.14 * 36 * (1/2)</gadget>
<output>56.52</output>

<gadget id="calculator">96 - 56.52</gadget>
<output>39.48</output>

<result>39.48</result>