Question 1074492
{{{(4.5*10^4)*(6.2*10^3)=(4.5*6.2)*(10^4*10^3)=27.9*10^7=(2.79*10)*10^7=2.79*(10*10^7)=highlight(2.79*10^8)}}}
Scientific notation requires that the number multiplied times the power of 10 be at least 1, but less than 10.
So, {{{27.9*10^7}}} is not in scientific notation,
and you have to "fix it" as shown above.