12+12+12+12.12
=12.1+12.1+12.1+12.12
=12.(1+1+1+12)
=12.15
=12.10+12.5
=120+60
=180
12+12+12+12.12
=12.1+12.1+12.1+12.12
=12.(1+1+1+12)
=12.15
=12.10+12.5
=120+60
=180
12+12+12+12.12
=12.1+12.1+12.1+12.12
=12.(1+1+1+12)
=12.15
=12.10+12.5
=120+60
=180
12+12+12+12.12
=12.1+12.1+12.1+12.12
=12.(1+1+1+12)
=12.15
=12.10+12.5
=120+60
=180
12 + 12 + 12 + 12 . 12
= 12 x 3 + 144
= 36 + 144
= 180