The number of A is (2/3) of the number of B. It is known that the number of A is 12. What is the number of B?
甲数是乙数的(2/3)，已知甲数是12，乙数是多少？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 / (2/3)</gadget>
<output>18</output>

<result>18</result>