The teacher wrote several consecutive natural numbers starting from 10 on the blackboard, 10, 11, 12, 13, 14..., and then erased one of the numbers. The average of the remaining numbers is 22.4. What is the erased number?
老师在黑板上写上若干个从10开始的连续自然数，10、11、12、13、14…，后来擦掉了其中一个数，剩下数的平均数是22.4，擦掉的数是多少？
<gadget id="calculator">22.5 * 2</gadget>
<output>45</output>

<gadget id="calculator">45 - 10 - 10</gadget>
<output>25</output>

<gadget id="calculator">25 + 1</gadget>
<output>26</output>

<gadget id="calculator">22.5 * 26</gadget>
<output>585</output>

<gadget id="calculator">1 - 1</gadget>
<output>0</output>

<gadget id="calculator">25 + 0</gadget>
<output>25</output>

<gadget id="calculator">22.4 * 25</gadget>
<output>560</output>

<gadget id="calculator">585 - 560</gadget>
<output>25</output>

<result>25</result>