Whakaoti i te 0.2*0.02/4pi10^-7(450)(1000)

$$\frac{ 0.2 \cdot 0.02 }{ 4 \pi { 10 }^{ -7 } (450)(1000) }$$

Aromātai

$$\frac{1}{45\pi }\approx 0.007073553$$

Ngā Upane Otinga

Whakareatia te 0.2 ki te 0.02, ka 0.004.

$$\frac{0.004}{4\pi \times 10^{-7}\times 450\times 1000}$$

Tātaihia te 10 mā te pū o -7, kia riro ko \frac{1}{10000000}.

$$\frac{0.004}{4\pi \times \frac{1}{10000000}\times 450\times 1000}$$

Whakareatia te 4 ki te \frac{1}{10000000}, ka \frac{1}{2500000}.

$$\frac{0.004}{\frac{1}{2500000}\pi \times 450\times 1000}$$

Whakareatia te \frac{1}{2500000} ki te 450, ka \frac{9}{50000}.

$$\frac{0.004}{\frac{9}{50000}\pi \times 1000}$$

Whakareatia te \frac{9}{50000} ki te 1000, ka \frac{9}{50}.

$$\frac{0.004}{\frac{9}{50}\pi }$$