The statement 'Product of 7 and 13z is equal to 144z' can be repseneted as :
7×13z=144z
‘Product of 7 and 13z’ is written as 7×13z and the symbol used to represent ‘equal to’ is =
So, the given statement, which is, product of 7 and 13z is equal to 144z, is written as 7×13z=144z.