The sum of A and B is 40, A:B=3:2, what is A's number?
甲、乙两数的和是40，甲：乙=3：2，甲数是多少．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">40 * (3/5)</gadget>
<output>24</output>

<result>24</result>