7 canteens share 4 tons of grain on average, how much is 1 ton for each canteen
7个食堂平均分4吨粮食，每个食堂分得1吨的多少
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">4 * (1/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(4/7) / 1</gadget>
<output>4/7 = around 0.571429</output>

<result>4/7 = around 0.571429</result>