Cross out 80 numbers from 12345678910111213...50 to make the remaining number the largest. What is the sum of the numbers?
从12345678910111213…50中划掉80个数字，使剩下的数最大，其数字之和是多少．
<gadget id="calculator">9 + 9 + 9 + 9 + 7 + 4 + 8 + 4 + 9 + 5</gadget>
<output>73</output>

<result>73</result>