(3/8) of A's number is (4/5) of B's number. Given that B's number is 15, what is A's number?
甲数的(3/8)是乙数的(4/5)，已知乙数是15，甲数是多少．
<gadget id="calculator">15 / 15</gadget>
<output>1</output>

<gadget id="calculator">1 * 32</gadget>
<output>32</output>

<result>32</result>