The numbers A and B are reciprocals of each other. If the number A is 1/3 of 12, what is the number B?
甲、乙两数互为倒数，如果甲数是12的(1/3)，那么乙数是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 * (1/3)</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>