If you mean 341 (base 5) divided by 12 (base 5) then we can use base 5 division:
First let's write the 12 times table (base 5):
1×12=12 (decimal equivalent 1×7=7)
2×12=24 (decimal equivalent 2×7=14=2×5+4)
3×12=41 (decimal equivalent 3×7=21=4×5+1)
4×12=103 (decimal equivalent 4×7=28=1×52+3)
23
12 ) 341
24
101
41
10 (remainder=10)
Decimal division is (3×25+4×5+1)/7=96/7=13 rem 5 (1310=2×5+3=235).