(6/7)L of oil is contained in a vial with a capacity of (3/7)L, how many vials are needed?
(6/7)L的油分装在容量是(3/7)L的小瓶里，需要多少个小瓶．
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(6/7) / (3/7)</gadget>
<output>2</output>

<result>2</result>