How to add two variables in robot framework

Robot Framework
1

hi
I am new at robot framework
I want fetch value from UI and after that performed the addition operation on that two value
result i get that two value like [‘703\nDC’] + [‘4773\nMC’]
fetch value like 703\nDC
second one 4773\nMC

@{element} =   Get Items List  ${loc_mc_dc}
@{CountList} =    Create List
@{CountList1} =   Create List
Append To List  ${CountList}  ${element}[0]
Append To List  ${CountList1}  ${element}[1]
${num1}=  Set Variable   ${CountList}
${num2}=  Set Variable   ${CountList1}
${mysum}=  Set Variable   ${CountList} + ${CountList1}
Log To Console     ${mysum}