find the +ve  integral solⁿ for x₁x₂x₃x₄x₅=840

see my method...

840=2³.3.5.7

now 3 can be placed in five spaces in 5 ways..

now 5 can be placed in five spaces in 5 ways..

now 7 can be placed in five spaces in 5 ways..

now 2^{3 .......}.......plz explain this part....all three 2's i.e 2³ can be placed in five spaces in 5 ways....also 2²X2 this can be done  also it can be divided into 2X2X2...so plz explain how to do....rate for coreect answer///