The number of A is 12, the number of B is 15, and the number of A is the number of B.
甲数为12，乙数是15，甲数是乙数的多少．
<gadget id="calculator">12 / 15</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>