Count cells with specific value in even columns

Range Reference:
Specific Value:
cell reference where the specific value is captured
Formula:

=SUMPRODUCT(--(MOD(COLUMN(C8:I8),2)=0),--(C8:I8=C5))

=SUMPRODUCT(--(MOD(COLUMN(C8:I8),2)=0),--(C8:I8=C5))