Multiply any two numbers in 5, 3 and 4, what is the probability that the product is an odd number?
任选5，3和4中的两个数相乘，积是单数的可能性是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>