A calculator costs 64 yuan after a 20% discount. How much does it cost if you get a 25% discount?
一种计算器，打八折后需64元，如果打七五折，需要多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">64 / (4/5)</gadget>
<output>80</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<result>60</result>