base 7...1234=4+3*7+2*49 +1*343...343+98+21+4...466 desimal
6543=3+4*7+5*49+6*343...2058+245+28+3....2,334 desimal
2,334+466=2,800 desimal
if yu wann go bak tu base 7,... 2800/7=400 with 0 leftover
400/7=57.14285 with stuf leftovr 400-399=1....so far yu hav 10
57/7=8.14285..., 7*8=56, so yu hav 1 leftover...yu hav 110
8/7=1+ 1 leftover...yu hav 11110 in base 7