one hundred twenty-eight
10 to the twenty-third power is not a unit of measurement. It is a number.
Three eights are equal to a value of twenty four when added together. When they are multiplied eight to the third power is equal to 512.
One third of 120000 is 40000
126/3 = 42
4 to the power of 23 is 70,368,744,177,664
Expressed as a proper fraction in its simplest form 3-5 = 1/243 or one two hundred and forty-third. Expressed as a decimal, rounded to three significant figures, this is equal to 0.00412.