A book is priced at 60 yuan. If you sell it, you can make a profit of 50%. If you sell it at a 20% discount, how much profit can you still make?
一本书定价60元，如果售出可获利50%，现打八折出售，仍可获利多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">60 * (4/5)</gadget>
<output>48</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">60 / (3/2)</gadget>
<output>40</output>

<gadget id="calculator">48 - 40</gadget>
<output>8</output>

<result>8</result>