The difference between the two numbers of A and B is 9, and (1/5) of A's number is equal to (1/2) of B's number, then the number of B is (how many
甲乙两数差为9，甲数的(1/5)等于乙数的(1/2)，则乙数是(多少
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>