Solution - Simplification or other simple results

Step  1  :

 1.1     10 = 2•5

(10)²⁰ = (2•5)²⁰ = 2²⁰ • 5²⁰

Equation at the end of step  1  :

  5 • (220•520)

Step  2  :

Multiplying exponents :

 2.1    5¹  multiplied by  5²⁰   = 5^{(1 + 20)} = 5²¹

Final result :

  (521•220)