45 billion
1 km = 1000 m1 m = 100 cmTherefore: 1 km = 100 000 cm450 km = 45 000 000 cm = 45 million cm
50000000 - 45573216 = 4426784
Brussels capital region has 160km² greenspace occupy 80km² but more than 40% of this green space is private (gardens, royal domaine) => 45 km² of pulic greenspace for 1 million inhabitants => 45 000 000 m²/ 1 000 000 answer is 45m² per inhabitant... not so bad :)
100 000 x 459.00 = 45 900 000
145,500
The result of 300 million times 45,000 is 13.5 trillion.
45 million
45 million
£45 million
45 million
45 million
Six zeros.