The number C is (4/5) of the number B, and the number B is (2/3) of the number A. What fraction of the number C is the number A?
丙数是乙数的(4/5)，乙数是甲数的(2/3)，丙数是甲数的几分之几？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(2/3) * (4/5)</gadget>
<output>8/15 = around 0.533333</output>

<result>8/15 = around 0.533333</result>