The sum of 2 times of a number plus 3 times of this number is 1.5, what is this number?
一个数的2倍加上这个数的3倍的和是1.5，这个数是多少．
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">1.5 / 5</gadget>
<output>0.3</output>

<result>0.3</result>