It takes 4 trucks to transport a batch of rice (2/7), how many trucks will be needed to finish the rest?
一批大米，运了4车才运走(2/7)，剩下的还要几车才能运完？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(2/7) / 4</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">(5/7) / (1/14)</gadget>
<output>10</output>

<result>10</result>