for currencies that are denominated in large numbers , airbnb may determine the functional base unit in which those currencies are denominated to be 10 , 100 or 1,000 of the currency ; for example , airbnb may round up an amount of 1,045 up to 1,050 and 1,044 down to 1,040 , or 837,500 up to 838,000 and 837,499 down to 837,000 .