Convert cells to hex

I have some data, and I would like to convert all the data to 256bit hex values.

64	76	246	6	0	0	129	0	64	76	246	6	1	0	129	1	64	76	246	6	1	0	129	2	64	76	246	6	0	0	129	3
64	76	246	6	1	0	129	4	64	76	246	6	0	0	129	5	64	76	246	6	0	0	129	6	64	76	246	6	0	0	129	7

How can I do this in calc?

It may be accidental but it might also mean something: Your examples are actually 256 bit (64 hex digits). Converted this way your example would result in 404CF60600008100404CF60601008101404CF60601008102404CF60600008103
for the first row. Is this what you want?

DEC2HEX() may be what you want