2 times a number is 5 more than the product of 2.5 times 6. What is this number?
一个数的2倍比2.5乘6的积多5，这个数是多少？
<gadget id="calculator">2.5 * 6</gadget>
<output>15</output>

<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>