Xiaopang goes to school, walks 64 meters per minute, and can get to school in 20 minutes; he has an urgent matter after home, and walks 16 meters faster than before, so how long does it take to get home from school?
小胖上学，每分钟走64米，20分钟可以到校；放学家有急事，每分钟比原来走快16米，那么放学回家需要多少时间？
<gadget id="calculator">64 + 16</gadget>
<output>80</output>

<gadget id="calculator">20 / 80</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">64 * (1/4)</gadget>
<output>16</output>

<result>16</result>