Today´s Earth:
volume = V(now)=1.1*10²¹m³
Total surface area= 5.1*10¹⁴m²
Land surface area= 30% = 1.5*10¹⁴m²
From this follows Earth´s volume “before expansion”:
V(before)= 1.8*10²⁰m³
Therefore V(before)/V(now)=16.4 %
i.e., Earth has expanded by a factor of 6 !!

Where did all this material come from?

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If everyone had even a basic grasp of scientific principles, this planet would be a better place (Phil Plait)

Die Lücke, die wir hinterlassen, ersetzt uns vollkommen [The gap we will leave behind will take our place entirely] (Carl Heinz Schroth)

1 + e^i*pi = 0