Xiaohua's birthday is in March, so what is the probability that his birthday is on March 12?
小华的生日是在3月份，那么他的生日是3月12日的可能性是多少．
<gadget id="calculator">1 / 31</gadget>
<output>1/31 = around 0.032258</output>

<result>1/31 = around 0.032258</result>