A batch of parts can be completed in 4 hours, so how many hours can be completed (3/8) of this batch of parts.
做一批零件4小时可以完成，那么多少小时可以完成这批零件的(3/8)．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">(3/8) / (1/4)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>