Answer
Multiples of 831 are:
831, 1662, 2493, 3324, 4155, 4986, 5817, 6648, 7479, 8310, 9141, 9972, 10803, 11634, 12465, 13296, 14127, 14958, 15789, 16620, 17451, 18282, 19113, 19944, 20775, 21606, 22437, 23268, 24099, 24930, 25761, 26592, 27423, 28254, 29085, 29916, 30747, 31578, 32409, 33240, 34071, 34902, 35733, 36564, 37395, 38226, 39057, 39888, 40719
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