The sum of A and B is 312. The ratio of A to B is 3:23. What is B?
甲、乙两数的和是312，甲数与乙数的比是3：23，乙数是多少．
<gadget id="calculator">3 + 23</gadget>
<output>26</output>

<gadget id="calculator">312 / 26</gadget>
<output>12</output>

<gadget id="calculator">12 * 23</gadget>
<output>276</output>

<result>276</result>