There are 2 digits in 30. They are 3 and 0.
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Yuo can make only one combination of 30 digits using 30 digits.
30000000
Three. The trailing two zeros are not significant.
3.141592653589793238462643383279
80 + 70 + 60 + 50 + 40 + 30 + 20 +10 = 360