30% of 40 =
                   ( 12 )

30% of 30 =
                   (       )

70% of 20 =
                   (       )

40% of 30 =
                   (       )

40% of 60 =
                   (       )

70% of 90 =
                   (       )

40% of 40 =
                   (       )

80% of 90 =
                   (       )

10% of 70 =
                   (       )

          +[         ]

10% of 6 =
                   ( 0.6 )

80% of 7 =
                   (       )

70% of 6 =
                   (       )

8% of 90 =
                   (       )

2% of 70 =
                   (       )

80% of 9 =
                   (       )

50% of 1 =
                   (       )

7% of 70 =
                   (       )

5% of 90 =
                   (       )

          +[         ]

70% of 3 =
                   ( 2.1 )

80% of 2 =
                   (       )

50% of 6 =
                   (       )

8% of 80 =
                   (       )

30% of 7 =
                   (       )

5% of 40 =
                   (       )

50% of 5 =
                   (       )

1% of 80 =
                   (       )

5% of 80 =
                   (       )

          +[         ]

       ++[[            ]]