Using the three numbers 1, 3, and 4 to put a three-digit number, what is the probability of getting an odd number?
用1，3，4三个数字摆一个三位数，摆出奇数的可能性是多少．
<gadget id="calculator">3 * 2 * 1</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 * 2 * (1/6)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>