8211
that has 3 in it, 2700 plus 37, it's 2737, ok so take 7 off is 273, then up to 28, ok it has 7. so that would be 4, 40, one under, 390, one over, so 391. check 7 again, down to 37, check 11 and it goes down to 38, to knock of 11 and 19 at the same time, checking 17 YES, so that would be 23 times 17, falling comfortably into place, as 23x17x7x3