Divide (2/7) rice into 2 parts on average, each part is its ((())/(())), how many decimeters are in each part.
把(2/7)米平均分成2份，每份是它的((())/(()))，每份是多少分米．
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(2/7) / 2</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>