So, you start with 4,81 then move the decimal mark thirteen times to the right to arrive at the number 48,1 trillion, or <em>forty-eight</em><em> </em><em>trillion,</em><em> </em><em>one</em><em> </em><em>hundred</em><em> </em><em>billion</em>. In fact, all scientific notation starts with a decimal with twodecimalplaces.