There is a beach of sand, (1/3) ton is used every day, how many tons are used in 5 days.
有一滩沙子，每天用去(1/3)吨，5天用去多少吨．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 5</gadget>
<output>5/3 = around 1.666667</output>

<result>5/3 = around 1.666667</result>