1.5 times a number is 6 times the sum of 3.1 and 0.5, what is this number? (solution by equation)
一个数的1.5倍是3.1与0.5的和的6倍，这个数是多少？(用方程解)
<gadget id="calculator">3.1 + 0.5</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 * 6</gadget>
<output>21.6</output>

<gadget id="calculator">21.6 / 1.5</gadget>
<output>14.4</output>

<result>14.4</result>