Question

Convert ${1347}_8$ to base $10$

Answer 1

${1347}_8=1\times 8^3+3\times 8^2+4\times 8^1+7\times 8^0$
$=1\times 512+3\times 64+4\times 8+7\times 1$
$=512+192+32+7$
$={743}_{10}$
Therefore ${1347}_8={743}_{10}$.