This is an easy number pattern forwarded to me by a former student through a text message. This puzzle is not that hard, so let us give a chance to high school and elementary school students as well as non-math majors. 
For math majors, try the intriguing number problem I posted at Math and Multimedia, my most active blog.
Consider the following numbers.
5 + 3 + 2 = 151022
9 + 2 + 4 = 183652
8 + 6 + 3 = 482466
5 + 4 + 5 = 202541
7 + 2 + 5 = 143547
From the pattern, what is 8 + 5 + 7?
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