The number A is (3/5) of the number B, the number C is (2/3) of the number A, what fraction of the number C is the number B?
甲数是乙数的(3/5)，丙数是甲数的(2/3)，丙数是乙数的几分之几？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/5) * (2/3)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>