Calculation: (((2**2+4**2+6**2+…+100**2)-(1**2+3**2+5**2+…+99**2 ))/(1+2+3+...+8+9+10+9+8+...+3+2+1))=how much.
计算：(((2**2+4**2+6**2+…+100**2)-(1**2+3**2+5**2+…+99**2))/(1+2+3+…+8+9+10+9+8+…+3+2+1))=多少．
<gadget id="calculator">101 * 50</gadget>
<output>5_050</output>

<gadget id="calculator">5_050 / 100</gadget>
<output>101/2 = around 50.5</output>

<result>101/2 = around 50.5</result>