Step 1: Write both numbers in scientific notation. For more information, use the SN Converter.
$$ 9000500000 = 9.0005\cdot 10^{9} $$$$ 1 = 1 $$Step 2: Multiply the numeric parts. Note that in intermediate calculations, we need 6 significant digits.
$$ 9.0005 \cdot 1 \approx 9.0005 $$Step 3: Multiply $10^{ 9 }$ by $10^{ 0 }$:
$$ 10^{ 9 } \cdot 10^{ 0 } = 10^{ 9+0 } = 10^{ 9 } $$Step 4: Write the solution as the product of the numbers obtained in steps two and three.
$$ 9.0005 \cdot 10^{ 9 } $$