The number obtained after multiplying a decimal by 3 times is 8.6 larger than the original number. What is the original number?
一个小数扩大3倍后得到的数比原数大8.6，原数是多少．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">8.6 / 2</gadget>
<output>4.3</output>

<result>4.3</result>