One approach is as below:
1)excel scope
2)use find first/last row to get the last row number
3) use assign and then use the last row number %50 to get the number of small sets(50 rows) ( sectionVar)
4)use while loop (i<=sectionVar)
5) Read range to get output in data table variable( range need to be dynamic by passing x+50 ( where x is an integer variable declared as zero)
I think this should work for you…So range will get increase as 50,100,150 like that