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T = 7 x 10 ⁴ : 21 x 10 ³

= 7/21 x 10

= 1/3 x 10

U = 84 x 10 ⁷ : 168 x 10 ³

= 1/2 x 10 ⁴

V = 4 x 10 ⁻⁶ x 10 ² : 12 x 10 ⁻³

= 4 x 10 ⁻⁴ : 12 x 10 ⁻³

= 1 /3 x 10 ⁻¹

W= 1.5 x 10 ⁻⁵ x 2 ² x 10 ⁶ : 0.14 x 10 ²

= 6 x 10 : 0.14 x 10 ²

= 600 /14 x 10 ⁻¹

= 300/7 x 10 ⁻¹