The sum of the numbers A and B is 120, the ratio of the numbers A and B is 2:3, what is the number B?
甲、乙两数和是120，甲、乙两数的比是2：3，乙数是多少．
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">120 / 5</gadget>
<output>24</output>

<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<result>72</result>