Take two different numbers arbitrarily from the numbers 1, 2, 3, 4, and 5 to form a two-digit number. What is the probability that the two-digit number is greater than 40?
从数字1、2、3、4、5中任意取两个不同的数，构成一个两位数，恰好这个两位数大于40的可能性是多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>