(1/4) of the number A is equal to (2/3) of the number B, if the number B is 30, what is the number A
甲数的(1/4)等于乙数的(2/3)，如果乙数是30，甲数是多少
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/3) / (1/4)</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">30 * (8/3)</gadget>
<output>80</output>

<result>80</result>