UbI := 11 10 UbI = 11 × 10 3 3 230 10 3 UbII := 11 10 UbII = 230 × 10 3 11 10 3 3 36 10 3 UbIII := 230 10 UbIII = 36 × 10 3 230 10 3 3 15.8 10 3 UbIV := 36 10 UbIV = 15.8 × 10 3 36 10 3