Mix 10 small pieces of paper with the numbers 1 to 10 written on them, turn the back side up, and draw one at random. What is the probability that it is exactly a multiple of 3?
把上面分别写有1至10这几个数字的10张小纸片混合后背面朝上，随意抽出一张，恰好是3的倍数可能性是多少．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>