The number A is (4/5) of the number B, and the number B is (2/3) of the number C. What fraction of the number A is the number C?
甲数是乙数的(4/5)，乙数是丙数的(2/3)，求甲数是丙数的几分之几？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">1 / (2/3)</gadget>
<output>3/2 = around 1.5</output>

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

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