A piece of square glass is cut off by 12 cm on one side and 8 cm on the other side. The area of the remaining rectangle is reduced by 1760 cm2 from the original area. What is the original side length of this square glass in cm?
一块正方形玻璃，一边截去12厘米，另一边截去8厘米，剩下的长方形面积比原来的面积减少1760平方厘米，这块正方形玻璃原来的边长是多少厘米？
<gadget id="calculator">12 * 8</gadget>
<output>96</output>

<gadget id="calculator">96 + 1_760</gadget>
<output>1_856</output>

<gadget id="calculator">12 + 8</gadget>
<output>20</output>

<gadget id="calculator">1_856 / 20</gadget>
<output>464/5 = around 92.8</output>

<result>464/5 = around 92.8</result>