The number A is 40, its (1/5) is equivalent to (1/3) of the B number, what is the B number.
甲数是40，它的(1/5)相当于乙数的(1/3)，乙数是多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/5) / (1/3)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">40 * (3/5)</gadget>
<output>24</output>

<result>24</result>