If specified: 3=2*3*4; 4=3*4*5; 12=11*12*13; ..., (1/(25))-(1/(26))=(1/(26 ))*□, then □=how much.
如果规定：3=2*3*4；4=3*4*5；12=11*12*13；…，(1/(25))-(1/(26))=(1/(26))*□，那么□=多少．
<gadget id="calculator">3 / 24</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>