I can only understand that you are asking what 820 means in time. 8:20 is 8:20 am, so this is 20 minutes past 8 o clock in the morning.
820 seconds is always 820 seconds
820
820
2h 45m
32% of 820 = 32% * 820 = 0.32 * 820 = 262.4
25% of 820= 25% * 820= 0.25 * 820= 205
2% of 820 = 2% * 820 = 0.02 * 820 = 16.4
820
The first ten positive integer multiples of 820 are: 1 x 820 = 820 2 x 820 = 1640 3 x 820 = 2460 4 x 820 = 3280 5 x 820 = 4100 6 x 820 = 4920 7 x 820 = 5740 8 x 820 = 6560 9 x 820 = 7380 10 x 820 = 8200
820
82 tens =82 × 10 = 820
820