There is a decimal whose sum with 3 is equal to its product with 3, what is the decimal.
有一个小数，它与3的和等于它与3的积，这个小数是多少．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>