It is difficult to see why you would do a multiplication using subtraction but one possible answer is: 8 * 604 = (10-1-1)*604 = 10*604 - 1*604 - 1*604 = 6040 - 604 - 604 = 4832
604 x 30 = 18120 604 x 8 = 4832 18120 + 4832 = 22952
7.2771
151
8 hours and 38 minutes.
It is: 604/2 = 302
604
604
8 divide by 448 = 0.017857142857142856
The positive integer factors of 604 are: 1, 2, 4, 151, 302, 604
778
Simply divide 8 by 50,469. The answer is 0.000158.