On a piece of rectangular paper with a length of 26cm and a width of 14cm, draw the largest semicircle, what is the area of the semicircle drawn?
在一张长26cm，宽14cm的长方形纸上，画一个最大的半圆，所画半圆面积是多少？
<gadget id="calculator">26 / 2</gadget>
<output>13</output>

<gadget id="calculator">13 ** 2</gadget>
<output>169</output>

<gadget id="calculator">169 / 2</gadget>
<output>169/2 = around 84.5</output>

<gadget id="calculator">3.14 * (169/2)</gadget>
<output>265.33</output>

<result>265.33</result>