Xiaohong goes to school. If her speed increases by 20%, she can arrive 8 minutes earlier. How many minutes did it take her to go to school?
小红去上学，如果速度提高20%，就可以早到8分钟．她原来上学要用多少分钟．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 8</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">8 + (8/5)</gadget>
<output>48/5 = around 9.6</output>

<gadget id="calculator">(1/5) - 1</gadget>
<output>-4/5 = around -0.8</output>

<gadget id="calculator">1 + (-4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(48/5) / (1/5)</gadget>
<output>48</output>

<result>48</result>