The number of A is 64, which is 18 more than twice the number of B. What is the number of B?
甲数是64，比乙数的2倍还多18，求乙数是多少？
<gadget id="calculator">64 - 18</gadget>
<output>46</output>

<gadget id="calculator">46 / 2</gadget>
<output>23</output>

<result>23</result>