If a product is discounted by 20, it can be 24 yuan cheaper. If it is discounted by 40, how much can it be cheaper?
某商品如果打八折，可便宜24元，如果打六折，可便宜多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">24 / (1/5)</gadget>
<output>120</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">120 * (3/5)</gadget>
<output>72</output>

<gadget id="calculator">120 - 72</gadget>
<output>48</output>

<result>48</result>