let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
#"Multiplied Column" = Table.TransformColumns(Source, {{"Size", each _ * 10, type number}}),
#"Added Prefix" = Table.TransformColumns(#"Multiplied Column", {{"Size", each "0" & Text.From(_, "en-US"), type text}})
in
#"Added Prefix"