Write 0.000 008 312 in standard form.
Write 5.21 × 107 as an ordinary number.
Work out 2.5×106×4.8×1035×10−4\displaystyle \frac{2.5 \times 10^6 \times 4.8 \times 10^3}{5 \times 10^{-4}}5×10−42.5×106×4.8×103
