(3 / 4 + 5 / 8) * what can be easily calculated in the calculation of 16 disjunction formula should be simply calculated

(3 / 4 + 5 / 8) * what can be easily calculated in the calculation of 16 disjunction formula should be simply calculated

(3/4+5/8)*16
=3/4*16+5/8*16
=12+10
=22