What is the sum of the digits of the 50 even numbers 2, 4, 6, 8, ... 98, 100?
2，4，6，8，…98，100这50个偶数的各位数字之和是多少．
<gadget id="calculator">2 + 4 + 6 + 8</gadget>
<output>20</output>

<gadget id="calculator">1 + 1 + 1 + 1 + 1</gadget>
<output>5</output>

<gadget id="calculator">5 + 20</gadget>
<output>25</output>

<gadget id="calculator">10 + 20</gadget>
<output>30</output>

<gadget id="calculator">15 + 20</gadget>
<output>35</output>

<gadget id="calculator">20 + 20</gadget>
<output>40</output>

<gadget id="calculator">25 + 20</gadget>
<output>45</output>

<gadget id="calculator">30 + 20</gadget>
<output>50</output>

<gadget id="calculator">35 + 20</gadget>
<output>55</output>

<gadget id="calculator">40 + 20</gadget>
<output>60</output>

<gadget id="calculator">45 + 20</gadget>
<output>65</output>

<gadget id="calculator">20 + 25 + 30 + 35 + 40 + 45 + 50 + 55 + 60 + 65 + 1</gadget>
<output>426</output>

<result>426</result>