A book has 59 pages. Among the 59 page numbers, how many page numbers do not contain the numbers "0" and "1".
一本书有59页，在59个页码中，不含数字"0"和"1"的页码有多少个．
<gadget id="calculator">59 - 1 - 10 - 4 - 4</gadget>
<output>40</output>

<result>40</result>