A fifth-grade classmate walked (5/2) kilometers on a spring outing at (3/8). How long does it take to walk 1 km at this speed?
五年级同学春游，(3/8)时走了(5/2)千米．照这样的速度，走1千米需要多少时．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(3/8) / (5/2)</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>