B2-F2：server用户数

B3-F3：server容量

=SQRT((POWER(B2/B3-SUM(B2:F2)/SUM(B3:F3),2)+POWER(C2/C3-SUM(B2:F2)/SUM(B3:F3),2)+POWER(D2/D3-SUM(B2:F2)/SUM(B3:F3),2)+POWER(E2/E3-SUM(B2:F2)/SUM(B3:F3),2)+POWER(F2/F3-SUM(B2:F2)/SUM(B3:F3),2))/5)