The remainder (not reminder) when 603 is divided (not dived) by 7 is 1.
It is 490/7 = 70
0.5714285714
7
7
It is: 53/7 = 7 with a remainder of 4
7 divided by 342 is ~0.0204678362573
233 divided by 7 is 33.29
100 divided by 7 is 14.29
63 divided by 7 = 9
21
350/7=50