Calculate and give the answer at the correct accuracy.

a) [[$ 0.05 \cdot 4,30 ≈ $]]

b) [[$ 101 \cdot 12 \cdot 10,6 ≈ $]]

c) [[$ 210 \cdot 0,0006 \cdot 89 \cdot 13,04 ≈ $]]

d) [[$ \displaystyle\frac {45 \cdot 802} {2,5} ≈ $]]