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50/π=x*x*(0.036/(100/π/0.014 - 1)) + x*( 0.036/(100/π/0.014 - 1) + 0.022
50/π=x*x*(0.036/(100/π/0.014 - 1)) + x*( 0.036/(100/π/0.014 - 1) + 0.022
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