How many different ways are there to take out an "L"-shaped pattern composed of 3 small squares in the 8*8 grid tray?
在8*8的方格机盘中，取出由3个小方格组成的"L"形图案，一共有多少种不同的取法．
<gadget id="calculator">9 - 2</gadget>
<output>7</output>

<gadget id="calculator">7 * 7</gadget>
<output>49</output>

<gadget id="calculator">49 * 4</gadget>
<output>196</output>

<result>196</result>