Step-by-step explanation:
A balanced equation is defined as the equation that has same number of atoms on both reactant and product side.
For example,

Number of atoms on reactant side are as follows.
Fe = 1
Cl = 3
Na = 2
= 1
Number of atoms on product side are as follows.
Fe = 2
Cl = 1
Na = 1
= 3
Therefore, balance the chemical reaction equation by multiplying
by 2 and NaCl by 3 on reactant side. Whereas multiply
by 1 and NaCl by 6 on product side as follows.
Thus, the balanced chemical reaction equation will be as follows.
