They are: MDCCCLXV and MDCLXXXVII respectively
It is already in Roman numerals and they represent 1776
1776 = MDCCLXXVI
MDCCLXXVI is the number 1776 in Roman numerals.
When 9 is converted into Roman numerals it is IX which is an abridged version of VIIII and so the required calculations are as follows:-MDCCLXXVI+IX = MDCCLXXXV => 1776+(10-1) = 1785MDCCLXXVI+VIIII = MDCCLXXXV => 1776+9 = 1785MDCCLXXVI-IX = MDCCLXVII => 1776-(10-1) = 1767MDCCLXXVI-VIIII = MDCCLXVII => 1776-9 = 1767Note that in mathematics -(10-1) changes to 1-10QED
1776
Latin numeracy is the same as Roman numerals and under the modern rules now governing the Roman numeral system the equivalent of 549 when converted into Roman numerals is now considered to be DXLIX but there exist historical evidence to suggest that the ancient Romans would have worked it out on an abacus counting device as DXXXXVIIII which can be abridged to IDL thus expediating the speed and ease of the required calculations as follows:-MDCCLXXVI+IDL = MMCCCXXV => 1776+(550-1) = 2325MDCCLXXVI+DXXXXVIIII = MMCCCXXV => 1776-449 = 2325MDCCLXXVI-IDL = MCCXXVII => 1776-(550-1) = 1227MDCCLXXVI-DXXXXVIIII = MCCXXVII => 1776-549 = 1227QED
1776 = MDCCLXXVI
MDCCLXXVI
Nowadays 249 when converted into Roman numerals is now considered to be CCXLIX but the ancient Romans probably worked out the required calculations as follows:-MDCCLXXVI+ICCL = MMXXV => 1776+(250-1) = 2025MDCCLXXVI+CCXXXXVIIII = MMXXV => 1776+249 = 2025MDCCLXXVI-ICCL = MDXXVII => 1776-(250-1) = 1527MDCCLXXVI-CCXXXXVIIII = MDXXVII => 1776-249 = 1527For more complicated calculations the Romans would have made use of an abacus calculating device.QED
1776. And those are Roman numerals by the way.
On the back, written in Roman numerals.
July, IV, MDCCLXXVI