5 x 50 = 250
6 x 7 = 42
250 + 6 = 256
256 x 6 = 1536
42 x 1536 = 64512

7 + 6 = 13
50 x 6 = 300
6 + 5 = 11
300 - 11 = 289
289 - 13 = 276