What is the probability of drawing a prime number by randomly drawing a card from 1 to 10?
在写有1～10的卡片中任意抽一张，抽到质数的可能性是多少
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>