What is (2/3) of 4?
4的(2/3)是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4 * (2/3)</gadget>
<output>8/3 = around 2.666667</output>

<result>8/3 = around 2.666667</result>