Teacher Li (1/4) walks (3/8) kilometers in an hour, how many hours does she need to walk a kilometer, and what is the formula
李老师(1/4)小时步行(3/8)千米，她行一千米需要多少小时，算式是多少
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/4) / (3/8)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>