The average of three numbers is 25.25, the first number is 12.5, the second number is 1.5 times the first number, what is the third number?
三个数的平均数是25.25，其中第一个数是12.5，第二个数是第一个数的1.5倍，第三个数是多少？
<gadget id="calculator">25.25 * 3</gadget>
<output>75.75</output>

<gadget id="calculator">12.5 * 1.5</gadget>
<output>18.75</output>

<gadget id="calculator">75.75 - 12.5 - 18.75</gadget>
<output>44.5</output>

<result>44.5</result>