The number A is (1/5) of the number B, the number B is (1/5) of the number C, and the number A is the number C
甲数是乙数的(1/5)，乙数是丙数的(1/5)，甲数是丙数的多少
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * (1/5)</gadget>
<output>1/25 = around 0.04</output>

<result>1/25 = around 0.04</result>