certain commodity has a profit of 50%, and after 70% is sold, the rest is sold at a discount, and 82% of the original profit can be obtained.
某商品按获利50%，售出70%后，剩下的打几折出售，还能获得原来利润的82%．
<gadget id="calculator">82 / 100</gadget>
<output>41/50 = around 0.82</output>

<result>41/50 = around 0.82</result>