29-2

μ_{0} = 4 π \times 10^{- 7} T \cdot m / A \approx 1, 26 \times 10^{- 6} T \cdot m / A

${\mu_0 = 4 \pi \times 10^{-7}\, \mathrm{T \cdot m/A} \approx 1,26 \times 10^{-6}\, \mathrm{T \cdot m/A}}$