When Xiao Ming reads a book, he reads 83 pages on the first day, 74 pages on the second day, 71 pages on the third day, and 64 pages on the fourth day. The number is 3.2 pages more. How many pages did Xiao Ming read on the fifth day?
小明读一本书，第一天读83页，第二天读74页，第三天读71页，第四天读64页，第五天读的页数比这五天中平均读的页数要多3.2页．小明第五天读了多少页？
<gadget id="calculator">83 / 5</gadget>
<output>83/5 = around 16.6</output>

<gadget id="calculator">74 / 5</gadget>
<output>74/5 = around 14.8</output>

<gadget id="calculator">71 / 5</gadget>
<output>71/5 = around 14.2</output>

<gadget id="calculator">64 / 5</gadget>
<output>64/5 = around 12.8</output>

<gadget id="calculator">(83/5) + (74/5) + (71/5) + (64/5) + 3.2</gadget>
<output>61.6</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">61.6 / (4/5)</gadget>
<output>77</output>

<result>77</result>