The number A is 80% of the number B, and the number B is 75% of the number C, so how much is the number A equal to the number C
甲数是乙数的80%，乙数是丙数的75%，则甲数是丙数的多少
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(4/5) / (4/3)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>