The number A is a, which is three times the number B. What is the difference between the numbers A and B?
甲数是a，是乙数的3倍，甲、乙两数的差是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>