can you check if right?

3 [(18-3) + 4 (5 +7)]
i got
93

18 - 3 = 15

5 + 7 = 12

So:

3 [( 18 - 3 ) + 4 ( 5 + 7 )] = 3 [ ( 15 + 4 ( 12 ) ] =

3 ( 15 + 48 ) =

3 63 = 189